Vocal and Facial Emotion Decoding Difficulties Relating to Social and Thought Problems: Highlighting Schizotypal Personality Disorder

Successful social interaction depends on the ability to decode emotion in the nonverbal behaviors of others. Because relationship difficulties are paramount in adolescents with schizotypal personality disorder (SPD), we predicted that adolescents with SPD would (1) make more emotion decoding errors than adolescents with other personality disorders (OPD) or non-psychiatric controls (NPC); and (2) exhibit more social and thought problems than OPD or NPC adolescents. Further, we predicted greater emotion decoding errors for all adolescents would relate to concurrent and future social problems, thought problems, and social reasoning deficits. SPD adolescents made more errors than OPD and NPC adolescents in decoding voices but not faces (except in specific emotion categories). For all adolescents, vocal errors correlated with greater social problems, and facial and vocal errors correlated with greater thought difficulties concurrently and a year later.