RCT of a Psychosocial Treatment for Children with High-Functioning ASD: Supplemental Analyses of Treatment Effects on Facial Emotion Encoding

This study evaluated the effect of a comprehensive psychosocial intervention on supplemental measures of facial emotion encoding for children with high-functioning autism spectrum disorder (HFASD) who were enrolled in prior randomized trials. A total of 60 children, ages 7 to 12 years were randomly assigned to treatment or wait-list control groups. Photographs of six posed facial expressions (happy, sad, angry, scared, surprised, and disgusted) taken at pretest and posttest were rated for encoding accuracy by na < ve raters. Ratings consisted of a) the extent to which the facial expression reflected each of the six possible emotions (extent rating) and b) a selection of the one emotion the raters identified as being portrayed (forced-choice). Results indicated significantly better encoding of sad at posttest for the treatment group on the extent (d = .58) and forced-choice (d = .56) ratings. Between-groups differences in encoding of the other emotions at posttest were non-significant. Implications for intervention and future research are presented.