Affect Expression During Social and Non-Social Contexts in Autistic Young Adults.

Researchers compared how 18 autistic young adults and 17 non-autistic young adults showed emotions on their faces during social conversations. Autistic participants showed less emotion overall, especially fewer positive expressions like smiles, and more neutral (blank) expressions. However, both groups showed more positive emotions when actively talking with someone, suggesting autistic people don't dislike friendly conversations - they just show their positive feelings less obviously on their face.

This study examined facial affect expression in autistic young adults (n=18) compared to non-autistic peers (n=17, mean age 21.5) during a novel social stress task alternating between social engagement and disengagement episodes. Results showed overall reduced expressivity in the autism group, characterized by fewer positive expressions and more neutral affect during social interactions. Importantly, both groups increased positive expressions during social engagement, suggesting autistic individuals do not find friendly social interactions aversive but may respond with muted positive affect. The findings support previous research indicating decreased expressivity in autism within ecologically valid social contexts.

Clinicians should not interpret reduced facial expressivity as disinterest or aversion to social interaction in autistic clients. Muted positive affect may mask genuine social enjoyment. Assessment and intervention approaches should account for these expression differences when evaluating social engagement and designing social skills interventions.

Small sample size (n=35 total). Study design and methodology not fully described in abstract. Single study findings require replication. Limited generalizability beyond young adult age group.

Autism spectrum disorder (ASD) is characterized by impairments in social affective engagement. The present study uses a mild social stressor task to add to inconclusive past literature concerning differences in affective expressivity between autistic young adults and non-autistic individuals from the general population (GP). Young adults (mean age = 21.5) diagnosed with ASD (n = 18) and a non-autistic comparison group (n = 17) participated in the novel social stress task. Valence (positive/negative) and intensity of facial affect were coded across four observational episodes that alternated between engagement and disengagement of social conversational partner.

Results indicated an overall attenuation in expressivity in the ASD group in comparison to the non-autistic group. Mean affect differed between groups, especially in the amount of affective expression. Both groups responded with increased positive expressions during social engagement episodes. The affect difference was driven by a smaller proportion of positive and a greater proportion of neutral affect displays in the ASD group compared to the non-autistic group during these episodes, and less so by negative affect differences.

The results suggest that friendly, non-threatening social interactions should not be assumed to be aversive to autistic individuals, and that these individuals may respond to such situations with muted positive valence. These findings are consistent with past reports of decreased expressivity in autistic individuals compared to individuals from the general population, specifically in an ecologically valid social context.