This observational study of the social interactions of 16 children with autism or Down syndrome in their homes found that differences in the frequencies and complexities of children's behaviors depended on behavioral intent in both groups. Socially intended behaviors were less frequent, less self-initiated, and less complex in children with…

Comparison of caregiver behaviors of children with either autism, developmental delay, or typical development found no difference between groups in caregiver synchronization with the child's focus of attention. Also, caregivers of children with autism who showed higher levels of synchronization during initial play interactions led to superior…

This study compared 29 females with Turner syndrome and 21 females with fragile X syndrome (ages 6-22) on a videotaped role-play interaction with 34 females in a comparison group. Three of eight behavioral measures of social skills differentiated the participant groups. Fragile-X subjects required more time to initiate interactions and Turner…

Siblings, mothers, and fathers in nine families of a child with autism were observed in dyadic play interactions with the autistic child. Parents exhibited more play behaviors toward children than siblings, but the autistic children initiated more interactions toward siblings than toward parents. Vineland Adaptive Behavior scale scores correlated…