Recognizing communicative intentions from single- and dyadic point light displays in autistic adults

The present study compares the ability of non-autistic (NA) and autistic adults (ASD) with intellectual functioning in the normal range to process communicative intentions from biological motion (BM) - a capacity often considered as a prerequisite for a higher-order social cognition (SC). Twenty-nine ASD and 29 NA completed two tasks assessing the ability to recognize the communicative cues presented by either one or two point-light agents, as well as one point-light emotion recognition task and additional measures of SC abilities. Autistic participants demonstrated a decreased ability to recognize communicative intentions from BM (p = 0.02 for dyadic and p = 0.03 for single agent task) despite similar levels of neurocognitive and social cognitive functioning. Additional exploratory analyses revealed an indirect trajectory linking the capacity to recognize communication from BM with autism symptoms through social cognitive capacity. Autistic adults may experience difficulties in processing communicative intentions, even in the absence of detectable higher-order SC problems. A possible mechanism might be the engagement in compensatory strategies that are inadequate for detecting lower-order intuitive social cues. Therefore, including tasks that assess the ability to detect communicative cues from BM may be beneficial for autistic adults with high cognitive abilities, in whom SC difficulties might be overlooked.