Exploratory behaviors of Down Syndrome and nondelayed young children between the mental ages of 16 and 32 months were examined in four situations in which they tried to find things which they saw reflected in a mirror. Down Syndrome and nondelayed children differed in number, type, and frequency of exploratory behaviors. (PCB)

Investigates the influence of chronological age, mental age, and handicapping condition on mothers' interactions with their handicapped young children. A total of 111 handicapped children ranging in age from 3 to 36 months and their mothers participated. Infants' general functioning and handicapping conditions were related to maternal…

Examines differences in habituation in a visual attention task as a function of chronological age, mental age, and handicapping condition. Subjects were 102 children who ranged in age from 3 to 36 months and who were classified as Down Syndrome, cerebral palsied, developmentally delayed, or multiply handicapped. (Author/RH)

Examined the nature of repetitive, ritualistic, and compulsive-like behaviors in typically developing and children and individuals with Down Syndrome (DS), matched on mental age (MA). Found that that both groups showed similar MA-related changes in compulsive-like behaviors. Younger children showed more compulsive-like behaviors than older.…