Comparison of the mental status of 30 subjects with Down's Syndrome mosaicism and 30 matched subjects with trisomy 21 Down's Syndrome found that the mean intelligent quotient of the mosaic Down's Syndrome group was significantly higher and that this group showed better verbal abilities and more normal visual-perceptual skills. (Author/DB)

As a result of the interest in variables affecting language development, and because of concern with disadvantaged groups, this study, involving 134 first and second grade Mexican-American and Anglo students, investigated five questions: (1) Is language development affected by high structured instructional materials and procedures which teach…

Kindergarten age children were screened at pre-registration through extensive diagnostic procedures for placement in a class designed for normal children with developmental delays staffed by a Special Education teacher and language therapist. Instruction was prescriptive and individualized. Of the twelve children who were high risk failures at the…

This book summarizes theory and discusses major issues pertaining to child development in the early childhood years. Chapter I provides an introduction to the conceptual framework and major theories of child development. Chapter II deals with motor, sensory, and perceptual development. Chapter III focuses on the cognitive-developmental theory of…