Understanding visual consciousness in autism spectrum disorders.

Perceptual differences between autistic and typically developing individuals do not stem from a deficiency in basic phenomenal consciousness—the raw, immediate experience of the world. Instead, the atypicality is cognitive and conceptual, affecting how perceptual objects are integrated with concepts. Drawing on three-level processing models, the paper argues that the second level of perceptual processing, which supports viewer-centered visual representations and early integration (the mark of phenomenal consciousness), is typical in autism. The third, more cognitive level, which integrates perceptual objects with concepts, is atypical. Thus, autistic individuals likely have similar basic perceptual experiences but differ in cognitive access to those experiences.

Study at a glance

Abstract

The paper focuses on the question of what the (visual) perceptual differences are between individuals with autism spectrum disorders (ASD) and typically developing (TD) individuals. We argue against the view that autistic subjects have a deficiency in the most basic form of perceptual consciousness-namely, phenomenal consciousness. Instead, we maintain, the perceptual atypicality of individuals with autism is of a more conceptual and cognitive sort-their perceptual experiences share crucial aspects with TD individuals. Our starting point is Ben Shalom's (2005, 2009) three-level processing framework for explaining atypicality in several domains of processing among autistics, which we compare with two other tripartite models of perception-Jackendoff's (1987) and Prinz's (2000, 2005a, 2007) Intermediate Level Hypothesis and Lamme's (2004, 2006, 2010) neural account of consciousness. According to these models, whereas the second level of processing is concerned with viewer-centered visual representations of basic visual properties and incorporates some early forms of integration, the third level is more cognitive and conceptual. We argue that the data suggest that the atypicality in autism is restricted mainly to the third level. More specifically, second-level integration, which is the mark of phenomenal consciousness, is typical, yet third-level integration of perceptual objects and concepts is atypical. Thus, the basic experiences of individuals with autism are likely to be similar to typical subjects' experiences; the main difference lies in the sort of cognitive access the subjects have to their experiences. We conclude by discussing implications of the suggested analysis of experience in autism for conceptions of phenomenal consciousness.