Fig. 2

Familiarization results. A Proportion looking during social and non-social trial types for the iASD-hi (red, filled), iASD-lo (red, open), PMS⁻ (blue, filled) and PMS⁺ (blue, open), and TD controls (gray). B Average area of interest (AOI) image entry rate for social (right) and non-social (left) trial types averaged across location. The iASD-lo (red, open) had a lower AOI entry rate compared to the PMS⁺ (blue, open) and TD control group (gray). C Test results. top: pre-switch test period for social and non-social preference scores (red-filled, iASD-hi; red-open, iASD-lo; blue-filled, PMS⁻; blue-open, PMS⁺; gray, TD controls) and bottom: post-switch test period. Values above zero denote a novelty preference and values below zero a familiarity preference. During the pre-switch period, all groups demonstrated a novelty preference for non-social images. In the post-switch period, the PMS subgroups and iASD-lo did not exhibit an image preference for social stimuli. Error bars represent ± 1 SE. *p < 0.5, **p < 0.01