Employed were a small sample of fifth graders to examine techniques for assessing the validity of psychosocial maturity (PSM) and the scales used to measure it. Three validation techniques were examined: (1) Data obtained from self-report scales, teacher ratings, and peer ratings were used to generate three multitrait-multimethod matrices (total…

A test battery that corresponded to the Gesell Developmental Assessment (GDA) was given to 400 4-6 year olds. A truncated version of the GDA had moderate reliability and predictive power. Experienced judges sometimes differed in their assessments of a child's developmental level and recommendations for grade placement. (GLR)