Zoom Brown Bag: The development of visual temporal processing

Zoom Brown Bag: The development of visual temporal processing

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Julie Freschl Postdoctoral Fellow

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Abstract: The visual system must organize dynamic input into meaningful percepts across time, balancing between stability and sensitivity to change. The Temporal Integration Window (TIW) has been hypothesized to underlie this balance: if two or more stimuli fall within the same TIW, they are integrated into a single percept; those that fall in different windows are segmented. Visual TIWs have mainly been studied in adults, showing average windows of 65 ms. However, it is unclear how temporal windows develop throughout early childhood. Differences in TIWs can influence high-level cognitive and perceptual processes that require well-adapted timing, such as object individuation, apparent motion, action sequence perception, language processing, action planning, and pragmatic aspects of communication, such as interactional synchrony. Because of the fundamental role temporal processing plays in visual perception, it is important then, to understand not only the trajectory of how TIWs change over typical development (TD) but also neurodevelopmental disorders like autism spectrum disorder (ASD). My work uncovered the developmental trajectory of visual temporal processing in young children with and without autism as well as mapped the development of peak alpha frequency - a potential neural correlate of visual temporal processing. Julie Freschl | Smith-Kettlewell (ski.org)

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