This study examined parent-teacher agreement on the Social Responsiveness Scale (SRS) in a racially and economically diverse sample of children in an urban school district. The researchers found lower parent-teacher concordance on the SRS than previously reported, and agreement varied by time, symptom severity, and subscale. Specifically, there was less agreement for less severely affected children than more severely affected children. Agreement on the Autistic Mannerisms subscale was also poor. This suggests that autistic mannerisms may vary between home and school environments.