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date: 24 August 2019

Abstract and Keywords

Individual differences in the ability to integrate local signals into global representations could provide important insights into fundamental mechanisms by which visual input is organized. A range of theoretical perspectives are outlined which could potentially explain individual differences in local and global perceptual tasks, from differences in the size of V1, to differences in establishing cortical rhythms, to differences in the scene statistics experienced in different cultural environments. A particular focus is placed on individual differences in autism and schizophrenia, where differences appear to be at their most extreme. The validity of local and global perceptual tasks is critically examined, and it is argued that, for further progress to be made, a greater emphasis has to be placed on the use of underlying factors measured on the basis of multiple tasks. Moreover, these tasks have to be tested on much larger, and more diverse populations of participants.

Keywords: Individual differences, vision, Gestalts, perceptual organization, grouping, local versus global perceptual processing, autism, schizophrenia

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