Figure 5.

(a) During immediate recognition test trials, average fixation duration for the mouth increased from childhood to adolescence and decreased from adolescence to adulthood typically (TD, dark gray bars), but did not change with age in autism (ASD, light gray bars). TD children and adults made shorter fixations to the mouth than did their peers with autism, although groups did not differ in adolescence. (b) Fixation count for the mouth increased from childhood to adolescence typically, but did not change with age in autism. Children with autism made more fixations to the mouth than did TD children; however, this pattern reversed by adolescence, with the TD group making more fixations on the mouth relative to the group with autism. Groups did not differ in adulthood.