a reliable parent-report measure that characterizes the frequency of participation across contexts for children with ASD is needed. With the increase in the number of children diagnosed with ASD, a psychometrically sound measure for use among occupational therapy practitioners working with families of children with ASD is needed. Although previous studies have investigated the extent to which activity participation is limited among children with ASD, the frequency with which this group of children participates in activities across contexts is unknown. Therefore, in this study we investigated the factor structure of a parent-report measure among a large sample of children with ASD, the Home and Community Activities Scale (adapted from Dunst et al., 2000).