This study tested the hypothesis that pretreatment level of play would predict the rate of increase in prelinguistic, intentional requesting during prelinguistic communication intervention of 8 children (ages 21 to 30 months) with developmental disabilities. A positive relation was found between amount of transitional or symbolic play at baseline…

Evaluation of the Kent Scoring Adaptation, which determines developmental ages in several domains based on an infant's performance on the Bayley Scales of Infant Development, with 27 at-risk infants supported the concurrent validity of the cognitive, language, and, to a degree, social domains of the Kent procedure but not the fine and gross motor…

Home movies of eight normal children and eight children later diagnosed as autistic were analyzed based on: (1) Piagetian criteria of sensorimotor development and semiotic functioning, and (2) developmental levels of action competencies. The age range covered was 4 to 42 months of age. The analysis showed that, from the second year of life, timing…

The Child Development Inventory (CDI), a restandardized version of the Minnesota Child Development Inventory, is completed by parents to measure the developmental progress of their children ages 15 months to 6 years or children judged to be functioning in that age range. It measures present development in eight areas: social, self-help, gross…