The sample was small and included people aged 15 to 22, so the findings cannot tell us how autistic people in general respond to art.
A 2020 experiment approached the question through eye tracking
[4]. Ten autistic and ten non-autistic participants viewed classical sculptures with original or altered body proportions and answered questions about beauty, liking and proportion.
Their behavioral ratings differed in some conditions. The gaze data were less straightforward. During the subjective liking task, the main eye-tracking measures did not differ between groups. During an objective beauty task, non-autistic participants spent longer looking at faces.
What participants said about an image and where they looked were therefore separate sources of information.
A larger study published in 2023 included 107 autistic young people and 145 non-autistic participants
[5]. They rated paintings that art experts had previously classified as higher or lower quality. Both groups distinguished between the categories, although the difference in ratings was smaller among autistic participants.
The authors considered whether greater reliance on deliberate evaluation could help explain the result. That remains an interpretation of the findings. It does not establish that autistic people generally make aesthetic judgments in a more deliberate way.
The studies use different images, tasks and methods, and their results do not point to a single pattern.
That uncertainty is useful. It moves the question away from trying to define an "autistic aesthetic" and toward examining the many processes involved when a person encounters an artwork.