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  • Title: Percezione e Attenzione (Modulo Percezione)
    Descriptive info: Percezione e Attenzione (Modulo Percezione).. Monday, 17 October 2011 16:55.. PisaVisionLab.. Qui sotto sono riportati tutti gli argomenti trattati nel modulo di "Percezione" del corso Psicologia della Percezione e dell'attenzione.. I links sulla destra permettonoo di scaricare le slide delle lezioni in formato pdf.. Si ricorda poi che per la preparazione dell'esame, il manuale di riferimento è: SENSAZIONE E PERCEZIONE.. Wolfe, J..  ...   0.. 6 Mb.. La visione spaziale.. 1 Mb.. 4.. Percepire e riconoscere gli oggetti.. 5.. La percezione del colore.. 3 Mb.. 6.. Percezione dello spazio e visione binoculare.. 7.. La percezione del movimento.. 9.. Udito: fisiologia e psicoacustica.. 7 Mb.. 10.. Acustica nel mondo reale.. 5 Mb.. 11.. Percezione della musica e del linguaggio.. 4 Mb.. 12.. Il tatto.. 13.. Olfatto.. 14.. Gusto..

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  • Title: STANIB Publications
    Descriptive info: STANIB Publications.. Thursday, 18 April 2013 18:36.. 2013.. Scocchia, L.. , Cicchini, G.. Triesch, J.. (2013).. What's "up"? Working memory contents can bias orientation processing, Vision Res, (76), 46-55.. We explored the interaction between the processing of a low-level visual feature such as orientation and the contents of working memory (WM).. In a first experiment, participants memorized the orientation of a Gabor patch and performed two subsequent orientation discriminations during the retention interval.. The WM stimulus exerted a consistent repulsive effect on the discrimination judgments: participants were more likely to report that the discrimination stimulus was rotated clockwise compared to the oblique after being presented with a stimulus that was tilted anti-clockwise from the oblique.. A control condition where participants attended to the Gabor patch but did not memorize it, showed a much reduced effect.. The repulsive effect was stable across the two discriminations in the memory condition, but not in the control condition, where it decayed at the second discrimination.. In a second experiment, we showed that the greater interference observed in the WM condition cannot be explained by a difference in cognitive demands between the WM and the control condition.. We conclude that WM contents can bias perception: the effect of WM interference is of a visual nature, can last over delays of several seconds and is not disrupted by the processing of intervening visual stimuli during the retention period.. Cicchini, G.. M.. , Binda, P.. , Burr, D.. C.. Morrone, M.. Transient spatiotopic integration across saccadic eye movements mediates visual stability,J Neurophysiol, 4 (109), 1117- 1125.. Eye movements pose major problems to the visual system, because each new saccade changes the mapping of external objects on the retina.. It is known that stimuli briefly presented around the time of saccades are systematically mislocalized, whereas continuously visible objects are perceived as spatially stable even when they undergo large transsaccadic displacements.. In this study we investigated the relationship between these two phenomena and measured how human subjects perceive the position of pairs of bars briefly displayed around the time of large horizontal saccades.. We show that they interact strongly, with the perisaccadic bar being drawn toward the other, dramatically altering the pattern of perisaccadic mislocalization.. The interaction field extends over a wide range (200 ms and 20 degrees ) and is oriented along the retinotopic trajectory of the saccade-induced motion, suggesting a mechanism that integrates pre- and postsaccadic stimuli at different retinal locations but similar external positions.. We show how transient changes in spatial integration mechanisms, which are consistent with the present psychophysical results and with the properties of "remapping cells" reported in the literature, can create transient craniotopy by merging the distinct retinal images of the pre- and postsaccadic fixations to signal a single stable object.. Binda, P.. , Pereverzeva, M.. Murray, S.. O.. Attention to bright surfaces enhances the pupillary light reflex,J Neurosci, 5 (33), 2199-2204.. One longstanding question is how early in the visual system attention exerts its influence.. Here we show that an effect of attention can be measured at the earliest possible stage of visual information processing, as a change in the optics of the eye.. We tested human subjects and found that covertly attending to bright surfaces results in an enhanced pupillary light reflex (PLR)-the pupillary constriction that occurs in response to light increments.. The PLR optimizes the optical quality of the retinal image across illumination conditions, increasing sensitivity by modulating retinal illumination, and improving acuity by reducing spherical aberrations.. The attentional modulation of the PLR that we describe constitutes a new mechanism through which vision is affected by attention; we discuss three alternatives for the neural substrates of this effect, including the possibility that attention might act indirectly, via its well established effects in early visual cortex.. Knoll, J.. , Morrone, M.. Bremmer, F.. Spatio-temporal topography of saccadic overestimation of time,Vision Res, (83C), 56-65.. Rapid eye movements (saccades) induce visual misperceptions.. A number of studies in recent years have investigated the spatio-temporal profiles of effects like saccadic suppression or perisaccadic mislocalization and revealed substantial functional similarities.. Saccade induced chronostasis describes the subjective overestimation of stimulus duration when the stimulus onset falls within a saccade.. In this study we aimed to functionally characterize saccade induced chronostasis in greater detail.. Specifically we tested if chronostasis is influenced by or functionally related to saccadic suppression.. In a first set of experiments, we measured the perceived duration of visual stimuli presented at different spatial positions as a function of presentation time relative to the saccade.. We further compared perceived duration during saccades for isoluminant and luminant stimuli.. Finally, we investigated whether or not saccade induced chronostasis is dependent on the execution of a saccade itself.. We show that chronostasis occurs across the visual field with a clear spatio-temporal tuning.. Furthermore, we report chronostasis during simulated saccades, indicating that spurious retinal motion induced by the saccade is a prime origin of the phenomenon.. Zimmermann, E.. , Fink, G.. R.. Burr, D.. Spatiotopic neural representations develop slowly across saccades,Curr Biol, 5 (23), R193-194.. One of the long-standing unsolved mysteries of visual neuroscience is how the world remains apparently stable in the face of continuous movements of eyes, head and body.. Many factors seem to contribute to this stability, including rapid updating mechanisms that temporarily remap the visual input to compensate for the impending saccade [1].. However, there is also a growing body of evidence pointing to more long-lasting spatiotopic neural representations, which remain solid in external rather than retinal coordinates [2-6].. In this study, we show that these spatiotopic representations take hundreds of milliseconds to build up robustly.. Lunghi, C.. Alais, D.. Touch Interacts with Vision during Binocular Rivalry with a Tight Orientation Tuning,PLoS One, 3 (8), e58754.. Multisensory integration is a common feature of the mammalian brain that allows it to deal more efficiently with the ambiguity of sensory input by combining complementary signals from several sensory sources.. Growing evidence suggests that multisensory interactions can occur as early as primary sensory cortices.. Here we present incompatible visual signals (orthogonal gratings) to each eye to create visual competition between monocular inputs in primary visual cortex where binocular combination would normally take place.. The incompatibility prevents binocular fusion and triggers an ambiguous perceptual response in which the two images are perceived one at a time in an irregular alternation.. One key function of multisensory integration is to minimize perceptual ambiguity by exploiting cross-sensory congruence.. We show that a haptic signal matching one of the visual alternatives helps disambiguate visual perception during binocular rivalry by both prolonging the dominance period of the congruent visual stimulus and by shortening its suppression period.. Importantly, this interaction is strictly tuned for orientation, with a mismatch as small as 7.. 5 degrees between visual and haptic orientations sufficient to annul the interaction.. These results indicate important conclusions: first, that vision and touch interact at early levels of visual processing where interocular conflicts are first detected and orientation tunings are narrow, and second, that haptic input can influence visual signals outside of visual awareness, bringing a stimulus made invisible by binocular rivalry suppression back to awareness sooner than would occur without congruent haptic input.. 2012.. Anobile, G.. , Cicchini, G.. (2012).. Linear mapping of numbers onto space requires attention,Cognition, 3 (122), 454- 459.. Mapping of number onto space is fundamental to mathematics and measurement.. Previous research suggests that while typical adults with mathematical schooling map numbers veridically onto a linear scale, pre-school children and adults without formal mathematics training, as well as individuals with dyscalculia, show strong compressive, logarithmic-like non-linearities when mapping both symbolic and non-symbolic numbers onto the numberline.. Here we show that the use of the linear scale is dependent on attentional resources.. We asked typical adults to position clouds of dots on a numberline of various lengths.. In agreement with previous research, they did so veridically under normal conditions, but when asked to perform a concurrent attentionally-demanding conjunction task, the mapping followed a compressive, non-linear function.. We model the non-linearity both by the commonly assumed logarithmic transform, and also with a Bayesian model of central tendency.. These results suggest that veridical representation numerosity requires attentional mechanisms.. Pooresmaeili, A.. "Non-retinotopic processing" in Ternus motion displays modeled by spatiotemporal filters,J Vis, 1 (12),.. PDF.. Recently, M.. Boi, H.. Ogmen, J.. Krummenacher, T.. U.. Otto, M.. H.. Herzog (2009) reported a fascinating visual effect, where the direction of apparent motion was disambiguated by cues along the path of apparent motion, the Ternus-Pikler group motion, even though no actual movement occurs in this stimulus.. They referred to their study as a "litmus test" to distinguish "non-retinotopic" (motion-based) from "retinotopic" (retina-based) image processing.. We adapted the test to one with simple grating stimuli that could be more readily modeled and replicated their psychophysical results quantitatively with this stimulus.. We then modeled our experiments in 3D (x, y, t) Fourier space and demonstrated that the observed perceptual effects are readily accounted for by integration of information within a detector that is oriented in space and time, in a similar way to previous explanations of other motion illusions.. This demonstration brings the study of Boi et al.. into the more general context of perception of moving objects.. , Arrighi, R.. , Cecchetti, L.. , Giusti M.. Optimal Encoding of Interval Timing in Expert Percussionists,.. J Neurosci, 3 (32), 1056-1060.. We measured temporal reproduction in human subjects with various levels of musical expertise: expert drummers, string musicians, and non-musicians.. While duration reproduction of the non-percussionists showed a characteristic central tendency or regression to the mean, drummers responded veridically.. Furthermore, when the stimuli were auditory tones rather than flashes, all subjects responded veridically.. The behavior of all three groups in both modalities is well explained by a Bayesian model that seeks to minimize reproduction errors by incorporating a central tendency prior, a probability density function centered at the mean duration of the sample.. We measured separately temporal precision thresholds with a bisection task; thresholds were twice as low in drummers as in the other two groups.. These estimates of temporal precision, together with an adaptable Bayesian prior, predict well the reproduction results and the central tendency strategy under all conditions and for all subject groups.. These results highlight the efficiency and flexibility of sensorimotor mechanisms estimating temporal duration.. Saccadic compression of symbolic numerical magnitude,PLoS One, 11 (7), e49587.. Stimuli flashed briefly around the time of saccadic eye movements are subject to complex distortions: compression of space and time; underestimate of numerosity.. Here we show that saccadic distortions extend to abstract quantities, affecting the representation of symbolic numerical magnitude.. Subjects consistently underestimated the results of rapidly computed mental additions and subtractions, when the operands were briefly displayed before a saccade.. However, the recognition of the number symbols was unimpaired.. These results are consistent with the hypothesis of a common, abstract metric encoding magnitude along multiple dimensions.. They suggest that a surprising link exists between the preparation of action and the representation of abstract quantities.. Panichi, M.. Baldassi, S.. Spatiotemporal dynamics of perisaccadic remapping in humans revealed by classification images,J Vis, 4 (12), 11.. Visual motion distorts visual and motor space, J Vis, 2 (12),.. In agreement with previous research, they did so veridically under normal conditions, but when asked to perform a concurrent attentionally- demanding conjunction task, the mapping followed a compressive, non-linear function.. Taubert, J.. , Aagten-Murphy, D.. Parr, L.. A.. A comparative study of face processing using scrambled faces,Perception, 4 (41), 460-473.. It is a widespread assumption that all primate species process faces in the same way because the species are closely related and they engage in similar social interactions.. However, this approach ignores potentially interesting and informative differences that may exist between species.. This paper describes a comparative study of holistic face processing.. Twelve subjects (six chimpanzees Pan troglodytes and six rhesus monkeys Macaca mulatta) were trained to discriminate whole faces (faces with features in their canonical position) and feature- scrambled faces in two separate conditions.. We found that both species tended to match the global configuration of features over local features, providing strong evidence of global precedence.. In addition, we show that both species were better able to generalize from a learned configuration to an entirely novel configuration when they were first trained to match feature-scrambled faces compared to when they were trained with whole faces.. This result implies that the subjects were able to access local information easier when facial features were presented in a scrambled configuration and is consistent with a holistic processing hypothesis.. Interestingly, these data also suggest that, while holistic processing in chimpanzees is tuned to own-species faces, monkeys have a more general approach towards all faces.. Thus, while these data confirm that both chimpanzees and rhesus monkeys process faces holistically, they also indicate that there are differences between the species that warrant further investigation.. Perception of duration in the parvocellular system, Front Integr Neurosci 6:14.. Both theoretical and experimental evidence suggests that duration perception is mediated preferentially by the color-blind but high temporally sensitive luminance pathway.. In this experiment we tested whether color modulated stimuli and high spatial frequency luminance modulated stimuli, which are known to be relayed mostly by the slow parvocellular system, are able to elicit reliable sense of duration.. We show that ramped color modulated stimuli seem to last less than luminance modulated stimuli matched for visibility.. The effect is large, about 200 ms and is constant at all durations tested (range 500–1100 ms).. However, high spatial frequency luminance stimuli obtain duration matches similar to those of low spatial frequency luminance modulated stimuli.. The results at various levels of contrast and temporal smoothing indicate that equiluminant stimuli have higher contrast thresholds to activate the mechanisms which time visual stimuli.. Overall the results imply that both the magnocellular and the parvocellular systems access reliably the timing mechanisms with a difference only in the way these are engaged.. Turi, M.. Spatiotopic perceptual maps in humans: evidence from motion adaptation,Proc Biol Sci, 1740 (279), 3091-3097.. One possibility is that our brain actively constructs a spatiotopic representation of the world, which is anchored in external-or at least head-centred-coordinates.. In this study, we show that the positional motion aftereffect (the change in apparent position after adaptation to motion) is spatially selective in external rather than retinal coordinates, whereas the classic motion aftereffect (the illusion of motion after prolonged inspection of a moving source) is selective in retinotopic coordinates.. The results provide clear evidence for a spatiotopic map in humans: one which can be influenced by image motion.. , Turi, M.. The effects of cross- sensory attentional demand on subitizing and on mapping number onto space,Vision Res,.. Various aspects of numerosity judgments, especially subitizing and the mapping of number onto space, depend strongly on attentional resources.. Here we use a dual-task paradigm to investigate the effects of cross-sensory attentional demands on visual subitizing and spatial mapping.. The results show that subitizing is strongly dependent on attentional resources, far more so than is estimation of higher numerosities.. But unlike many other sensory tasks, visual subitizing is equally affected by concurrent attentionally demanding auditory and tactile tasks as it is by visual tasks, suggesting that subitizing may be amodal.. Mapping number onto space was also strongly affected by attention, but only when the dual-task was in the visual modality.. The non-linearities in numberline mapping under attentional load are well explained by a Bayesian model of central tendency.. Gori, M.. , Tinelli, F.. , Sandini, G.. , Cioni, G.. Impaired visual size-discrimination in children with movement disorders,Neuropsychologia, 8 (50), 1838-1843.. Multisensory integration of spatial information occurs late in childhood, at around eight years (Gori, Del Viva, Sandini, Burr, 2008).. For younger children, the haptic system dominates size discrimination and vision dominates orientation discrimination: the dominance may reflect sensory calibration, and could have direct consequences on children born with specific sensory disabilities.. Here we measure thresholds for visual discrimination of orientation and size in children with movement disorders of upper limbs.. Visual orientation discrimination was very similar to the age-matched typical children, but visual size discrimination thresholds were far worse, in all eight individuals with early- onset movement disorder.. This surprising and counterintuitive result is readily explained by the cross-sensory calibration hypothesis: when the haptic sense is unavailable for manipulation, it cannot be readily used to estimate size, and hence to calibrate the visual experience of size: visual discrimination is subsequently impaired.. This complements a previous study showing that non-sighted children have reduced acuity for haptic orientation, but not haptic size, discriminations (Gori, Sandini, Martinoli, Burr, 2010).. Together these studies show that when either vision or haptic manipulation is impaired, the impairment also impacts on complementary sensory systems that are calibrated by that one.. Â.. Tomassini, A.. , Gori, M.. Active movement restores veridical event-timing after tactile adaptation,J Neurophysiol, 8 (108), 2092-2100.. Growing evidence suggests that time in the subsecond range is tightly linked to sensory processing.. Event- time can be distorted by sensory adaptation, and many temporal illusions can accompany action execution.. In this study, we show that adaptation to tactile motion causes a strong contraction of the apparent duration of tactile stimuli.. However, when subjects make a voluntary motor act before judging the duration, it annuls the adaptation- induced temporal distortion, reestablishing veridical event-time.. The movement needs to be performed actively by the subject: passive movement of similar magnitude and dynamics has no effect on adaptation, showing that it is the motor commands themselves, rather than reafferent signals from body movement, which reset the adaptation for tactile duration.. No other concomitant perceptual changes were reported (such as apparent speed or enhanced temporal discrimination), ruling out a generalized effect of body movement on somatosensory processing.. We suggest that active movement resets timing mechanisms in preparation for the new scenario that the movement will cause, eliminating inappropriate biases in perceived time.. Our brain seems to utilize the intention-to-move signals to retune its perceptual machinery appropriately, to prepare to extract new temporal information.. Tinelli, T.. , Tosetti, M.. , Morrone M.. Blindsight in children with congenital and acquired cerebral lesions, Cortex (published online 10 August 2012).. It has been shown that unconscious visual function can survive lesions to optical radiations and/or primary visual cortex (V1), a phenomenon termed “blindsightâ€.. Studies on animal models (cat and monkey) show that the age when the lesion occurs determines the extent of residual visual capacities.. Much less is known about the functional and underlying neuronal repercussions of early cortical damage in humans.. We measured sensitivity to several visual tasks in four children with congenital unilateral brain lesions that severely affected optic radiations, and in another group of three children with similar lesions, acquired in childhood.. In two of the congenital patients, we measured blood oxygenation level dependent (BOLD) activity in response to stimulation of each visual field quadrants.. Results show clear evidence of residual unconscious processing of position, orientation and motion of visual stimuli displayed in the scotoma of congenitally lesioned children, but not in the children with acquired lesions.. The calcarine cortical BOLD responses were abnormally elicited by stimulation of the ipsilateral visual field and in the scotoma region, demonstrating a profound neuronal reorganization.. In conclusion, our data suggest that congenital lesions can trigger massive reorganization of the visual system to alleviate functional effects of early brain insults.. Manning, C.. Pellicano, E.. The development of speed discrimination abilities,Vision Res, (70), 27-33.. The processing of speed is a critical part of a child's visual development, allowing children to track and interact with moving objects.. Despite such importance, no study has investigated the developmental trajectory of speed discrimination abilities or precisely when these abilities become adult-like.. Here, we measured speed discrimination thresholds in 5-, 7-, 9-, 11-year-olds and adults using random dot stimuli with two different reference speeds (slow: 1.. 5 deg/s; fast: 6 deg/s).. Sensitivity for both reference speeds improved exponentially with age and, at all ages, participants were more sensitive to the faster reference speed.. However, sensitivity to slow speeds followed a more protracted developmental trajectory than that for faster speeds.. Furthermore, sensitivity to the faster reference speed reached adult-like levels by 11 years, whereas sensitivity to the slower reference speed was not yet adult-like by this age.. Different developmental trajectories may reflect distinct systems for processing fast and slow speeds.. The reasonably late development of speed processing abilities may be due to inherent limits in the integration of neuronal responses in motion-sensitive areas in early childhood.. Plasticità ed adattabilità della visione,Giornale Italiano di Psicologia, (3), 517-522.. 2011.. (2011).. Spatiotopic selectivity of adaptation-based compression of event duration, J Vis, 2 (11), 21; author reply 21a.. Bruno, I.. Ayhan, and A.. Johnston (2010) have recently challenged our report of spatiotopic selectivity for adaptation of event time (D.. Burr, A.. Tozzi, M.. Morrone, 2007) and also our claim that retinotopic adaptation of event time depends on perceived speed.. To assist the reader judge this issue, we present here a mass of data accumulated in our laboratories over the last few years, all confirming our original conclusions.. We also point out that where Bruno et al.. made experimental measurements (rather than relying on theoretical reasoning), they too find clearly significant spatiotopically tuned adaptation-based compression of event time but of lower magnitude to ours.. We speculate on the reasons for the differences in magnitude.. Pascucci, D.. , Megna, N.. , Panichi, M.. Acoustic cues to visual detection: a classification image study,J Vis, 6 (11),.. A non-informative sound is known to improve contrast detection thresholds for a synchronous visual target (M.. Lippert, N.. K.. Logothetis, C.. Kayser, 2007).. We investigated the spatio-temporal characteristics of the mechanisms underlying this crossmodal effect by using a classification image paradigm specifically suited to investigate perceptual templates across both space and time (P.. Neri D.. J.. Heeger, 2002).. A bright bar was embedded in 2D (space-time) dynamic noise and observers were asked to detect its presence in both unimodal (only visual) and bimodal (audio-visual) conditions.. Classification image analysis was performed and the 1st and 2nd order kernels were derived.. Our results show that the cross-modal facilitation of detection consists in a reduction of activity of the early mechanisms elicited by the onset of the stimulation and not directly involved in the identification of the target.. In fact, the sound sharpens the 2nd order kernels (involved in target detection) by suppressing the activation preceding the target, whereas it does not influence the 1st order kernels.. These data suggest that the sound affects some non-linear process involved with the detection of a visual stimulus by, decreasing the activity of contrast energy filters temporally uncorrelated with the target, hence reducing temporal uncertainty.. , Anobile, G.. Adaptation Affects Both High and Low (Subitized) Numbers Under Conditions of High Attentional Load,Seeing and Perceiving, (24), 141-150.. It has recently been reported that, like most sensory systems, numerosity is subject to adaptation.. However, the effect seemed to be limited to numerosity estimation outside the subitizing range.. In this study we show that low numbers, clearly in the subitizing range, are adaptable under conditions of high attentional load.. These results support the idea that numerosity is detected by a perceptual mechanism that operates over the entire range of numbers, supplemented by an attention-based system for small numbers (subitizing).. Thompson, P.. Mikellidou, K.. Applying the Helmholtz illusion to fashion: horizontal stripes won't make you look fatter,Iperception, 1 (2), 69-76.. A square composed of horizontal lines appears taller and narrower than an identical square made up of vertical lines.. Reporting this illusion, Hermann von Helmholtz noted that such illusions, in which filled space seems to be larger than unfilled space, were common in everyday life, adding the observation that ladies' frocks with horizontal stripes make the figure look taller.. As this assertion runs counter to modern popular belief, we have investigated whether vertical or horizontal stripes on clothing should make the wearer appear taller or fatter.. We find that a rectangle of vertical stripes needs to be extended by 7.. 1% vertically to match the height of a square of horizontal stripes and that a rectangle of horizontal stripes must be made 4.. 5% wider than a square of vertical stripes to match its perceived width.. This illusion holds when the horizontal or vertical lines are on the dress of a line drawing of a woman.. We have examined the claim that these effects apply only for 2-dimensional figures in an experiment with 3-D cylinders and find no support for the notion that horizontal lines would be 'fattening' on clothes.. Significantly, the illusion persists when the horizontal or vertical lines are on pictures of a real half-body mannequin viewed stereoscopically.. All the evidence supports Helmholtz's original assertion.. Lunghi C, Burr DC, Morrone C..  Brief periods of monocular deprivation disrupt ocular balance in human adult visual cortex, Curr Biol.. 2011 Jul 26;21(14):R538-9.. Neuroplasticity is a fundamental property of the developing mammalian visual system, with residual potential in adult human cortex [1].. A short period of abnormal visual experience (such as occlusion of one eye) before closure of the critical period has dramatic and permanent neural consequences, reshaping visual cortical organization in favour of the non-deprived eye [2,3].. We used binocular rivalry [4] - a sensitive probe of neural competition - to demonstrate that adult human visual cortex retains a surprisingly high degree of neural plasticity, with important perceptual consequences.. We report that 150 minutes of monocular deprivation strongly affects the dynamics of binocular rivalry, unexpectedly causing the deprived eye to prevail in conscious perception twice as much as the non- deprived eye, with significant effects for up to 90 minutes.. Apparent contrast of stimuli presented to the deprived eye was also increased, suggesting that the deprivation acts by  ...   carried out.. Selected articles were scored using the PEDro scale and classified as high or low quality study both with the original cut off of 6 and a modified cut off of 5.. A linear regression analysis between year of publication and quality rate was used to test whether the quality of the studies improved with time.. A total of 18 RCTs were selected.. Six articles (33.. 3%) and 10 articles (55.. 56%) were classified as having high quality when the original cut off or the modified cut off of the PEDro scale were used, respectively.. Analysis shows no time- related changes in PEDro scores.. The results show that reported quality is moderate for RCTs in neglect rehabilitation.. Saccades compress space, time and number,Trends Cogn Sci, 12 (14), 528-533.. It has been suggested that space, time and number are represented on a common subjective scale.. Saccadic eye movements provide a fascinating test.. Saccades compress the perceived magnitude of spatial separations and temporal intervals to approximately half of their true value.. The question arises as to whether saccades also compress number.. They do, and compression follows a very similar time course for all three attributes: it is maximal at saccadic onset and decreases to veridicality within a window of approximately 50ms.. These results reinforce the suggestion of a common perceptual metric, which is probably mediated by the intraparietal cortex; they further suggest that before each saccade the common metric for all three is reset, possibly to pave the way for a fresh analysis of the post-saccadic situation.. , Cicchini, M.. Spatial maps for time and motion,Exp Brain Res, 2 (206), 121-128.. In this article, we review recent research studying the mechanisms for transforming coordinate systems to encode space, time and motion.. A range of studies using functional imaging and psychophysical techniques reveals mechanisms in the human brain for encoding information in external rather than retinal coordinates.. This reinforces the idea of a tight relationship between space and time, in the parietal cortex of primates.. Filippi, L.. , Cavallaro, G.. , Fiorini, P.. , Daniotti, M.. , Benedetti, V.. , Cristofori, G.. Study protocol: safety and efficacy of propranolol in newborns with Retinopathy of Prematurity (PROP-ROP): ISRCTN18523491,BMC Pediatr, (10), 83.. BACKGROUND: Despite new therapeutic approaches have improved the prognosis of newborns with retinopathy of prematurity (ROP), an unfavourable structural and functional outcome still remains high.. There is high pressure to develop new drugs to prevent and treat ROP.. There is increasing enthusiasm for anti-VEGF drugs, but angiogenic inhibitors selective for abnormal blood vessels would be considered as an optimal treatment.. In an animal experimental model of proliferative retinopathy, we have recently demonstrated that the pharmacological blockade of beta-adrenoreceptors improves retinal neovascularization and blood retinal barrier breakdown consequent to hypoxia.. The purpose of this study is to evaluate the propranolol administration in preterm newborns suffering from a precocious phase of ROP in terms of safety and efficacy in counteracting the progression of retinopathy.. METHODS/DESIGN: Preterm newborns (gestational age at birth lower than 32 weeks) with stage 2 ROP (zone II-III without plus) will be randomized, according to their gestational age, to receive propranolol added to standard treatment (treatment adopted by the ETROP Cooperative Group) or standard treatment alone.. Propranolol will be administered until retinal vascularization will be completely developed, but not more than 90 days.. Forty-four participants will be recruited into the study.. To evaluate the safety of propranolol administration, cardiac and respiratory parameters will be continuously monitored.. Blood samplings will be performed to check renal, liver and metabolic balance.. To evaluate the efficacy of propranolol, the progression of the disease, the number of laser treatments or vitrectomies, the incidence of retinal detachment or blindness, will be evaluated by serial ophthalmologic examinations.. Visual function will be evaluated by means of behavioural standardized tests.. DISCUSSION: This pilot study is the first research that explores the possible therapeutic role of beta blockers in ROP.. The objective of this research is highly ambitious: to find a treatment simple, inexpensive, well tolerated and with few adverse effects, able to counteract one of the major complications of the prematurity.. Any favourable results of this research could open new perspectives and original scenarios about the treatment or the prevention of this and other proliferative retinopathies.. TRIAL REGISTRATION: Current Controlled Trials ISRCTN18523491; ClinicalTrials.. gov Identifier NCT01079715; EudraCT Number 2010-018737-21.. Subitizing but not estimation of numerosity requires attentional resources,J Vis, 6 (10), 20.. The numerosity of small numbers of objects, up to about four, can be rapidly appraised without error, a phenomenon known as subitizing.. Larger numbers can either be counted, accurately but slowly, or estimated, rapidly but with errors.. There has been some debate as to whether subitizing uses the same or different mechanisms than those of higher numerical ranges and whether it requires attentional resources.. We measure subjects' accuracy and precision in making rapid judgments of numerosity for target numbers spanning the subitizing and estimation ranges while manipulating the attentional load, both with a spatial dual task and the "attentional blink" dual-task paradigm.. The results of both attentional manipulations were similar.. In the high-load attentional condition, Weber fractions were similar in the subitizing (2-4) and estimation (5-7) ranges (10-15%).. In the low-load and single-task condition, Weber fractions substantially improved in the subitizing range, becoming nearly error-free, while the estimation range was relatively unaffected.. The results show that the mechanisms operating over the subitizing and estimation ranges are not identical.. We suggest that pre-attentive estimation mechanisms works at all ranges, but in the subitizing range, attentive mechanisms also come into play.. Temporal auditory capture does not affect the time course of saccadic mislocalization of visual stimuli,J Vis, 2 (10), 7 1-13.. Irrelevant sounds can "capture" visual stimuli to change their apparent timing, a phenomenon sometimes termed "temporal ventriloquism".. Here we ask whether this auditory capture can alter the time course of spatial mislocalization of visual stimuli during saccades.. We first show that during saccades, sounds affect the apparent timing of visual flashes, even more strongly than during fixation.. However, this capture does not affect the dynamics of perisaccadic visual distortions.. Sounds presented 50 ms before or after a visual bar (that change perceived timing of the bars by more than 40 ms) had no measurable effect on the time courses of spatial mislocalization of the bars, in four subjects.. Control studies showed that with barely visible, low-contrast stimuli, leading, but not trailing, sounds can have a small effect on mislocalization, most likely attributable to attentional effects rather than auditory capture.. These findings support previous studies showing that integration of multisensory information occurs at a relatively late stage of sensory processing, after visual representations have undergone the distortions induced by saccades.. , Schnier, F.. The contribution of scene context on change detection performance,Vision Res, 20 (50), 2062- 2068.. The gist of a visual scene is perceived in a fraction of a second but in change detection tasks subjects typically need several seconds to find the changing object in a visual scene.. Here, we report influences of scene context on change detection performance.. Scene context manipulations consisted of scene inversion, scene jumbling, where the images were cut into 24 pieces and randomly recombined, and scene configuration scrambling, where the arrangement of the objects in the scene was randomized.. Reaction times, where significantly lower in images with normal scene context.. We conclude that scene context structures scene perception.. Touch disambiguates rivalrous perception at early stages of visual analysis,Curr Biol, 4 (20), R143-144.. Binocular rivalry is a powerful tool to study human consciousness: two equally salient stimuli are imaged on the retinae, but at any given instant only one is consciously perceived, the other suppressed.. The suppression takes place early, probably in V1.. However, a trace of the suppressed signal has been detected along the dorsal visual pathway (BOLD responses) and demonstrated with psychophysical experiments.. The suppressed image of a rotating sphere during rivalry is restored to consciousness when the observer actively controls the rotation and a similar effect on the suppressed signal has been shown for motion perception and reflexive eye movements (see Supplemental References).. Here, we asked whether cross-modal sensory signals could selectively interact with rivalrous visual signals that are analyzed at a very early stage, probably V1.. An auditory stimulus, when attended, can influence binocular rivalry, extending dominance times for a congruent visual stimulus.. Tactile information can  also disambiguate unstable visual motion and can fuse with vision to improve discrimination (e.. g.. slant).. Our results indicate that a haptic oriented stimulus can disambiguate visual perception during binocular rivalry of gratings of orthogonal orientation, not only by prolonging dominance but also by curtailing suppression of the visual stimulus of matched orientation.. The effect is selective for the spatial frequency of the stimuli, suggesting that haptic signals interact with early visual representations to enhance access to conscious perception.. Ross, J.. Vision senses number directly,J Vis, 2 (10), 10 11-18.. We have recently suggested that numerosity is a primary sensory attribute, and shown that it is strongly susceptible to adaptation.. Here we use the Method of Single Stimuli to show that observers can extract a running average of numerosity of a succession of stimuli to use as a standard of comparison for subsequent stimuli.. On separate sessions observers judged whether the perceived numerosity or density of a particular trial was greater or less than the average of previous stimuli.. Thresholds were as precise for this task as for explicit comparisons of test with standard stimuli.. Importantly, we found no evidence that numerosity judgments are mediated by density.. Under all conditions, judgements of numerosity were as precise as those of density.. Thresholds in intermingled conditions, where numerosity varied unpredictably with density, were as precise as the blocked thresholds.. Judgments in constant-density conditions were more precise thresholds than those in variable-density conditions, and numerosity judgements in conditions of constant-numerosity showed no tendency to follow density.. We further report the novel finding that perceived numerosity increases with decreasing luminance, whereas texture density does not, further evidence for independent processing of the two attributes.. All these measurements suggest that numerosity judgments can be, and are, made independently of judgments of the density of texture.. Vision: keeping the world still when the eyes move,Curr Biol, 10 (20), R442-444.. A long-standing problem for visual science is how the world remains so apparently stable in the face of continual rapid eye movements.. New experimental evidence, and computational models are helping to solve this mystery.. Campanella, F.. Visual information gleaned by observing grasping movement in allocentric and egocentric perspectives,Proc Biol Sci, 1715 (278), 2142- 2149.. One of the major functions of vision is to allow for an efficient and active interaction with the environment.. In this study, we investigate the capacity of human observers to extract visual information from observation of their own actions, and those of others, from different viewpoints.. Subjects discriminated the size of objects by observing a point-light movie of a hand reaching for an invisible object.. We recorded real reach- and-grasp actions in three-dimensional space towards objects of different shape and size, to produce two- dimensional 'point-light display' movies, which were used to measure size discrimination for reach-and-grasp motion sequences, release-and-withdraw sequences and still frames, all in egocentric and allocentric perspectives.. Visual size discrimination from action was significantly better in egocentric than in allocentric view, but only for reach-and-grasp motion sequences: release-and-withdraw sequences or still frames derived no advantage from egocentric viewing.. The results suggest that the system may have access to an internal model of action that contributes to calibrate visual sense of size for an accurate grasp.. 2009.. , Banks, M.. S.. (2009).. Auditory dominance over vision in the perception of interval duration,Exp Brain Res, 1 (198), 49-57.. The "ventriloquist effect" refers to the fact that vision usually dominates hearing in spatial localization, and this has been shown to be consistent with optimal integration of visual and auditory signals (Alais and Burr in Curr Biol 14(3):257-262, 2004).. For temporal localization, however, auditory stimuli often "capture" visual stimuli, in what has become known as "temporal ventriloquism".. We examined this quantitatively using a bisection task, confirming that sound does tend to dominate the perceived timing of audio-visual stimuli.. The dominance was predicted qualitatively by considering the better temporal localization of audition, but the quantitative fit was less than perfect, with more weight being given to audition than predicted from thresholds.. As predicted by optimal cue combination, the temporal localization of audio-visual stimuli was better than for either sense alone.. , Arecchi, F.. T.. Gheri, C.. Cueing the interpretation of a Necker Cube: a way to inspect fundamental cognitive processes,Cogn Process, (10 Suppl 1), S95-99.. The term perceptual bistability refers to all those conditions in which an observer looks at an ambiguous stimulus that can have two or more distinct but equally reliable interpretations.. In this work, we investigate perception of Necker Cube in which bistability consists of the possibility to interpret the cube depth in two different ways.. We manipulated the cube ambiguity by darkening one of the cube faces (cue) to provide a clear cube interpretation due to the occlusion depth index.. When the position of the cue is stationary the cube perceived perspective is steady and driven by the cue position.. However, when we alternated in time the cue position (i.. e.. we changed the position of the darkened cube face) two different perceptual phenomena occurred: for low frequencies the cube perspective alternated in line with the position of the cue; however for high frequencies the cue was no longer able to bias the perception but it appears as a floating feature traveling across the solid with the cube whole perspective that returns to be bistable as in the conventional, bias-free, case.. , Marini, F.. Meaningful auditory information enhances perception of visual biological motion,J Vis, 4 (9), 25 21-27.. Robust perception requires efficient integration of information from our various senses.. Much recent electrophysiology points to neural areas responsive to multisensory stimulation, particularly audiovisual stimulation.. However, psychophysical evidence for functional integration of audiovisual motion has been ambiguous.. In this study we measure perception of an audiovisual form of biological motion, tap dancing.. The results show that the audio tap information interacts with visual motion information, but only when in synchrony, demonstrating a functional combination of audiovisual information in a natural task.. The advantage of multimodal combination was better than the optimal maximum likelihood prediction.. Mislocalization of flashed and stationary visual stimuli after adaptation of reactive and scanning saccades,J Neurosci, 35 (29), 11055-11064.. When we look around and register the location of visual objects, our oculomotor system continuously prepares targets for saccadic eye movements.. The preparation of saccade targets may be directly involved in the perception of object location because modification of saccade amplitude by saccade adaptation leads to a distortion of the visual localization of briefly flashed spatial probes.. Here, we investigated effects of adaptation on the localization of continuously visible objects.. We compared adaptation-induced mislocalization of probes that were present for 20 ms during the saccade preparation period and of probes that were present for 1 s before saccade initiation.. We studied the mislocalization of these probes for two different saccade types, reactive saccades to a suddenly appearing target and scanning saccades in the self-paced viewing of a stationary scene.. Adaptation of reactive saccades induced mislocalization of flashed probes.. Adaptation of scanning saccades induced in addition also mislocalization of stationary objects.. The mislocalization occurred in the absence of visual landmarks and must therefore originate from the change in saccade motor parameters.. After adaptation of one type of saccade, the saccade amplitude change and the mislocalization transferred only weakly to the other saccade type.. Mislocalization of flashed and stationary probes thus followed the selectivity of saccade adaptation.. Since the generation and adaptation of reactive and scanning saccades are known to involve partially different brain mechanisms, our results suggest that visual localization of objects in space is linked to saccade targeting at multiple sites in the brain.. , Del Viva, M.. , Bancale, A.. , Pascale, R.. Motion perception in preterm children: role of prematurity and brain damage,Neuroreport, 15 (20), 1339-1343.. We tested 26 school-aged children born preterm at a gestational age below 34 weeks, 13 with and 13 without periventricular brain damage, with four different visual stimuli assessing perception of pure global motion (optic flow), with some form information (segregated translational motion) and form-defined static stimuli.. Results were compared with a group of age-matched healthy term-born controls.. Preterm children with brain damage showed significantly lower sensitivities relative to full-term controls in all four tests, whereas those without brain damage were significantly worse than controls only for the pure motion stimuli.. Furthermore, when form information was embedded in the stimulus, preterm children with brain lesions scored significantly worse than those without lesions.. These results suggest that in preterm children dorsal stream-related functions are impaired irrespective of the presence of brain damage, whereas deficits of the ventral stream are more related to the presence of periventricular brain damage.. Pei, F.. , Baldassi, S.. , Procida, G.. , Igliozzi, R.. , Tancredi, R.. , Muratori, F.. Neural correlates of texture and contour integration in children with autism spectrum disorders,Vision Res, 16 (49), 2140-2150.. In this study, we have used an electrophysiological paradigm to investigate the neural correlates of the visual integration of local signals across space to generate global percepts in a group of low functioning autistic kids.. We have analyzed the amplitude of key harmonics of the Visual Evoked Potentials (VEPs) recorded while participants observed orientation-based texture and contour stimuli, forming coherent global patterns, alternating with visual patterns in which the same number of local elements were randomly oriented in order to loose any globally organized feature.. Comparing the results of the clinical sample with those obtained in an age- matched control group, we have observed that in the texture conditions the 1st and 3rd harmonics, containing signature of global form processing (Norcia, Pei, Bonneh, Hou, Sampath, Pettet, 2005), were present in the control group, while in the experimental group only the 1st harmonic was present.. In the Contour condition the 1st harmonic was not present for both groups while the 3rd harmonic was significantly present in the control group but absent in the group with autism.. Moreover, the amount of organization required to elicit significant 1st harmonic response in the texture condition was higher in the clinical group.. The present results bring additional support to the idea that texture and contour processing are supported by independent mechanisms in normal vision.. Autistic vision would thus be characterized by a preserved, perhaps weaker texture mechanism, possibly mediated by feedback interactions between visual areas, and by a disfunction of the mechanism supporting contour processing, possibly mediated by long-range intra-cortical connections.. Within this framework, the residual ability to detect contours shown in psychophysical studies could be due to the contribution of the texture mechanism to contour processing.. Verghese, P.. Pooling and segmenting motion signals,Vision Res, 10 (49), 1065-1072.. Humans are extremely sensitive to visual motion, largely because local motion signals can be integrated over a large spatial region.. On the other hand, summation is often not advantageous, for example when segmenting a moving stimulus against a stationary or oppositely moving background.. In this study we show that the spatial extent of motion integration is not compulsory, but is subject to voluntary attentional control.. Measurements of motion coherence sensitivity with summation and search paradigms showed that human observers can combine motion signals from cued regions or patches in an optimal manner, even when the regions are quite distinct and remote from each other.. Further measurements of contrast sensitivity reinforce previous studies showing that motion integration is preceded by a local analysis akin to contrast thresholding (or intrinsic uncertainty).. The results were well modelled by two standard signal-detection-theory models.. , Pei, F.. , Recupero, G.. , Viespoli, M.. Search superiority in autism within, but not outside the crowding regime,Vision Res, 16 (49), 2151-2156.. Visual cognition of observers with autism spectrum disorder (ASD) seems to show an unbalance between the complementary functions of integration and segregation.. This study uses visual search and crowding paradigms to probe the relative ability of children with autism, compared to normal developments children, to extract individual targets from cluttered backgrounds both within and outside the crowding regime.. The data show that standard search follows the same pattern in the ASD and control groups with a strong effect of the set size that is substantially weakened by cueing the target location with a synchronous spatial cue.. On the other hand, the crowding effect of eight flankers surrounding a small peripheral target is virtually absent in the clinical sample, indicating a superior ability to segregate cluttered visual items.. This data, along with evidence of an impairment to the neural system for binding contours in ASD, bring additional support to the general idea of a shift of the trade-off between integration and segregation toward the latter.. More specifically, they show that when discriminability is balanced across conditions, an advantage in odd-man out tasks is evident in ASD observers only within the crowding regime, when binding mechanism might get compulsorily triggered in normal observers.. Shifts in spatial attention affect the perceived duration of events,J Vis, 1 (9), 9 1-13.. We investigated the relationship between attention and perceived duration of visual events with a double- task paradigm.. The primary task was to discriminate the size change of a 2 degree circle presented 10 degrees left, right, above, or below fixation; the secondary task was to judge the temporal separation (from 133 ms to 633 ms) of two equiluminant horizontal bars (10 deg x 2 deg) briefly flashed 12 degrees above or below fixation.. The stimulus onset asynchrony (SOA) between primary and secondary task ranged from -1300 ms to +1000 ms.. Temporal intervals in proximity of the onset of the primary task stimuli were perceived strongly compressed by up to 40%.. The effect was proportional to the size of the interval with a maximum effect at 100 ms SOA.. Control experiments show that neither primary-task difficulty, nor the type of primary task discrimination (form or motion, or equiluminant or luminance contrast) nor spatial congruence between primary and secondary task alter the effect.. Interestingly, the compression occurred only when the intervals are marked by bars presented in separated spatial locations: when the interval is marked by two bars flashed in the same spatial position no temporal distortion was found.. These data indicate that attention can alter perceived duration when the brain has to compare the passage of time at two different spatial positions, corroborating earlier findings that mechanisms of time perception may monitor separately the various spatial locations possibly at high level of analysis.. Spatiotemporal distortions of visual perception at the time of saccades,J Neurosci, 42 (29), 13147-13157.. Both space and time are grossly distorted during saccades.. Here we show that the two distortions are strongly linked, and that both could be a consequence of the transient remapping mechanisms that affect visual neurons perisaccadically.. We measured perisaccadic spatial and temporal distortions simultaneously by asking subjects to report both the perceived spatial location of a perisaccadic vertical bar (relative to a remembered ruler), and its perceived timing (relative to two sounds straddling the bar).. During fixation and well before or after saccades, bars were localized veridically in space and in time.. In different epochs of the perisaccadic interval, temporal perception was subject to different biases.. At about the time of the saccadic onset, bars were temporally mislocalized 50-100 ms later than their actual presentation and spatially mislocalized toward the saccadic target.. Importantly, the magnitude of the temporal distortions co-varied with the spatial localization bias and the two phenomena had similar dynamics.. Within a brief period about 50 ms before saccadic onset, stimuli were perceived with shorter latencies than at other delays relative to saccadic onset, suggesting that the perceived passage of time transiently inverted its direction.. Based on this result we could predict the inversion of perceived temporal order for two briefly flashed visual stimuli.. We developed a model that simulates the perisaccadic transient change of neuronal receptive fields predicting well the reported temporal distortions.. The key aspects of the model are the dynamics of the "remapped" activity and the use of decoder operators that are optimal during fixation, but are not updated perisaccadically.. , Silva, O.. Temporal mechanisms of multimodal binding,Proc Biol Sci, 1663 (276), 1761-1769.. The simultaneity of signals from different senses-such as vision and audition-is a useful cue for determining whether those signals arose from one environmental source or from more than one.. To understand better the sensory mechanisms for assessing simultaneity, we measured the discrimination thresholds for time intervals marked by auditory, visual or auditory-visual stimuli, as a function of the base interval.. For all conditions, both unimodal and cross-modal, the thresholds followed a characteristic 'dipper function' in which the lowest thresholds occurred when discriminating against a non-zero interval.. The base interval yielding the lowest threshold was roughly equal to the threshold for discriminating asynchronous from synchronous presentations.. Those lowest thresholds occurred at approximately 5, 15 and 75 ms for auditory, visual and auditory-visual stimuli, respectively.. Thus, the mechanisms mediating performance with cross-modal stimuli are considerably slower than the mechanisms mediating performance within a particular sense.. We developed a simple model with temporal filters of different time constants and showed that the model produces discrimination functions similar to the ones we observed in humans.. Both for processing within a single sense, and for processing across senses, temporal perception is affected by the properties of temporal filters, the outputs of which are used to estimate time offsets, correlations between signals, and more.. Visual aftereffects,Curr Biol, 1 (19), R11-14..

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  • Title: STANIB Projects
    Descriptive info: STANIB Projects.. Thursday, 18 April 2013 18:26.. Functional imaging.. Neural sites encoding numerosity.. This project investigates the neural sites that show selectivity for the number of items in a display, and are affected by.. adaptation.. to number.. Classification imaging techniques reveal number encoding in area IPS, and show that adaptation affects the encoding strategies of this area.. Researchers involved in the project include Burr, Morrone, Castaldi, Murphy and Tosetti.. Size-adaptation affects the perceived size and the neural representation of the stimulus in primary visual cortex.. Most perceptual properties can be affected by adaptation.. In this study we show that prolonged viewing of a large, peripherally displayed stimulus causes smaller test stimulus presented to the same region to be perceived smaller than its actual size, while adaptation to a smaller stimulus causes the test to appear larger.. Adaptation to a stimulus of the same size did not change perceived size.. To explore the neural correlates of this effect, we measured the spatial extent of the BOLD activation of the retinotopically defined primary visual cortex (area V1).. We found that the size of the activated V1 surface.. decreased.. by 26% after adaptation to a larger  ...   non-veridical.. People involved: Morrone, Arrighi, Pooresmaeli, Tosetti, Biaggi.. Clinical and translational research.. Adaptation in autism.. Studies by our group have shown that children affected with autism demonstrate reduced levels of adaptation to faces compared with age-matched peers.. This has important implications for how perception processes in people with autism may differ from typically developing children, as outlined in a recent opinion article in Trends in Cognitive Sciences (Pellicano and Burr, 2012).. We are pursuing this line of research, with several projects, in studying particular adaptation to numerosity in autism, as well as other projects, such as perception of time.. Researchers in this project include Burr, Morrone, Murphy, Turi, Tancredi, Tinelli and Elizabeth Pellicano (Institute of Education, University of London).. Blindsight in children with cerebral lesions.. It has been shown that unconscious visual function can survive lesions to optical radiations and/or primary visual cortex (V1), a phenomenon termed “blindsight”.. People contributing to this project include: Tinelli, Cicchini, Arrighi, Tosetti, Cioni, Morrone and Guzzetta.. Visual stability during saccadic eye movements.. Transient spatiotopic integration across saccadic eye movements mediates visual stability.. People involved: Burr, Cicchini, Binda, Morrone.. Spatiotopic neural representations develop slowly across saccades.. Burr, Morrone, Zimmermann..

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  • Title: STANIB People
    Descriptive info: STANIB People.. Thursday, 18 April 2013 18:13.. Stella Maris.. The Stella Maris Foundation hosts two main classes of research: functional resonance imaging, and clinical and translational research.. The Stella Maris team includes:.. Professor Maria Concetta Morrone –.. Director of Vision Laboratory.. Professor Giovanni Cioni –.. Scientific Director.. Dr Michela Tosetti –.. Director Centre for Imagining.. Dr Arezoo Pooresmaeli –.. Research Scientist.. Dr Francesca Tinelli –.. Neuro-psychiatrist.. Dr Anna Maria Chilosi –.. Dr Raffaela Tangredi –.. Dr Andrea Guzzetta –.. Neonatologist.. Dr Paola Brovedani –.. Neuro-psychologist.. Dr Alessandro Compani –.. Marco Turi –.. grad-student.. Iride Montanari –.. laboratory manager.. CNR Institute of Neuroscience.. Most of the  ...   scientist.. Dr Sofia Crespi --.. Dr Eckart Zimmermann --.. Post-doctoral scientist.. Dr Michela Pannichi --.. Dr Matteo Caleo --.. Dr Lucia Galli-Resta --.. Dr Enrica Stettoi --.. University of Florence – Department of Neuroscience, psychology, pharmacology and child health: psychology section.. The University of Florence is heavily involved in psychophysical studies.. People employed by the University of Florence include:.. Prof David Burr --.. Principal Investigator.. Dr Stefano Baldassi --.. Dr Michela Del Viva --.. Dr Roberto Arrighi --.. Dr David Murphy --.. Graduate Student.. Dr Elisa Castaldi --.. Dr Giovanni Anobile --.. Dr Michele Fornaciai --.. Dr Claudia Lunghi --.. Giulia Cartocci -.. Research assistant..

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  • Title: MEMORY
    Descriptive info: MEMORY.. Friday, 08 July 2011 17:08.. Memory Project..

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  • Title: Active Vision - Flyers
    Descriptive info: Active Vision - Flyers.. Monday, 10 June 2013 13:49.. Workshop Flyers and Press Coverage.. Workshop Flyers.. Workshop Flyer (English).. Locandina (Italian).. Press Articles.. PrimoPiano del 02 Giugno 2013 (Italian).. More Inforormation:.. Introduction.. -.. Getting There.. Getting Around.. Venue.. Accomodation.. Recreational Activities.. Workshop Flyes and Press Coverage.. Programme Overview.. Detalied Scientific Programme.. Information about Speakers.. Contacts.. Active Vision Workshop 2013.. Active Vision - Flyers..

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  • Title: Active Vision - Speakers
    Descriptive info: Active Vision - Speakers.. Thursday, 06 June 2013 13:05.. Further Information on Invited Speakers.. Dora Angelaki.. Baylor College of Medicine.. personal homepage.. Jan Atkinson.. University College of London -.. Ol Braddick.. University College of London.. Doris Braun.. - University of Gießen -.. Frank Bremmer.. University of Marburg -.. Michele Fabre-Thorpe.. Centre de Recherche Cerveau et Cognition, Toulouse University and CNRS -.. Tamar Flash.. Weizmann Institute -.. Karl Gegenfurtner.. Michael Goldberg.. - Columbia University -.. Mel Goodale.. - University of Waterloo -.. Markus Lappe.. - University of Münster -.. Lamberto Maffei..  ...   - Max Planck Institute for Neurological Research, Cologne -.. Peter Neri.. - University of Aberdeen -.. Tania Pasternak.. - University of Rochester -.. - Institute of Education -.. Giulio Sandini.. - Italian Institute of Technology -.. Steve Shevell.. - University of Chicago -.. Donatella Spinelli.. - University of Roma "Foro Italico" -.. Peter Thompson.. - University of York -.. Simon Thorpe.. - Centre de Recherche Cerveau et Cognition, Toulouse University and CNRS -.. Andrew Welchman.. - University of Birmingham -.. Robert Wurtz.. National Institute of Health -.. Active Vision - Speakers..

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  • Title: Active Vision - Contacts
    Descriptive info: Active Vision - Contacts.. Wednesday, 22 May 2013 14:08.. In case of need please do not hesitate to contact us.. These are our mobile numbers:.. Active Vision - Contacts..

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  • Title: Active Vision - Getting Around
    Descriptive info: Active Vision - Getting Around.. Monday, 20 May 2013 17:10.. A list of the key places of the Conference (including Venue and Restaurants) has been put on Google Map.. Click on the image to go to.. Google Maps.. Touristic Information.. Larino.. (guided trip scheduled on 20th June).. Saepinum Ruins.. (guided trip scheduled on 21st June).. Gambatesa.. Museo Sannitico di Campobasso.. Highlights of the Matese Region.. Active Vision - Getting Around..

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  • Title: Active Vision Short
    Descriptive info: Active Vision Short.. Wednesday, 21 November 2012 21:55.. Active Vision Short..

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  • Title: Active Vision - Recreational
    Descriptive info: Active Vision - Recreational.. Wednesday, 21 November 2012 16:55.. Attilia-Saepinum Archeological Site.. Sant'Elia is located nearby wondeful Romain ruins.. Lake of Occhito - Miralago.. On the third evening.. Horseriding.. For the more adventurous.. Active Vision - Recreational..

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