Minimally verbal children with autism may ‘see the point, but do not (always) point to what they see’

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Abstract

During typical development, non-social visual object recognition emerges in the first year of life, engaging both low-level cues (e.g., color, orientation) and higher-level mechanisms involving inference and prior knowledge. Little is known about how these processes function in minimally verbal children with autism (mvASD). We studied 22 children with mvASD using touchscreen-based oddball and contour detection tasks, targeting low-level (e.g., shape, orientation) and mid-level (e.g., Kanizsa figures, 3D shapes) visual stimuli, measuring both pointing and eye-gaze responses. All children detected the oddball in the easiest condition with faint distractors, and approximately half succeeded across all low-level tasks. Notably, some “high performers” showed reduced accuracy under mid-level conditions with greater stimulus complexity. Strikingly — and not originally anticipated — several “low performers” who failed to point correctly nonetheless fixated on the correct target. In the Kanizsa oddball task, several mvASD participants, unlike typically developing (TD) peers, consistently pointed to local inducers rather than to the center of the illusory triangle. While the overall deterioration in performance with increased visual complexity suggests that mvASD visual perception may rely on low-level representations with attenuated inference-based processing, the dissociation between gaze and pointing — along with atypical local-pointing behavior — indicates that performance depends not only on what is perceived, but also on how they use the visual signal to drive their behavior. They may, quite literally, see the point — but not point to what they see.

Lay Summary

Minimally verbal children with autism are often treated as a uniform group, but this study revealed wide differences in how they process and respond to visual information. While many accurately perceived simple images, some struggled with more complex ones—and several looked directly at the correct target but pointed elsewhere, revealing a disconnect between perception and action. These findings highlight the need to consider both individual differences and the role of visual complexity and layout, as well as the importance of assessment methods that go beyond motor (pointing) responses to better understand and support individuals with mvASD.

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