Examination of developmental scores of 198 infants and young children with Down's Syndrome attending exemplary early intervention programs found more similarity to other children in Personal Social and Adaptive Domains and less similarity in Communication and Cognitive Domains of the Battelle Developmental Inventory. These differences were…

A group of 16 infants (ages 6 to 24 months) with Down's Syndrome (DS) were exposed to two operant learning tasks varying in control of reinforcement. Comparison with chronological and developmental age matched controls found DS subjects characterized by increasing adoption of counterproductive learning behaviors with increasing age. (Author/DB)

Recent experimental research is synthesized to identify distinctive biobehavioral characteristics of Down's Syndrome persons across their lifespan. It is argued that educational and other intervention programs have not demonstrated strong gains having significant durability or generalization. Recommended is an interactionist function-structure…