Training increased conservation responding but not verbalization of conservation principles. Stimulus desirability did not affect presence of conservation even in laboring-class subjects. (MH)

Contrary to previous findings, children as young as 3 1/2-4 years of age exhibited the ability to use nonverbal, ikonic mediation. Production deficiencies and inefficiencies were more common than mediation deficiencies and inefficiencies. (MH)

Evaluates validity of the Denver Developmental Screening Test used for assessing the development of preschoolers. (AJ)

A review of Educational Psychology: Instruction and Behavioral Change (Appleton-Century-Crofts, 1970) by Francis J. DiVesta and George G. Thompson. (DS)

Suggests that categorization tasks be included in India's preschool programs. (WY)

Contrary to Luria's hypothesis, verbal control did not affect sensori-motor performance in this experiment involving 160 preschool children in four age groups tested on Luria's 2-choice tasks. (WY)

Uses data from earlier study by Hollender to estimate mental ages for four quartiles of intelligence for a seven-year span (ages 12-18). Comparison of four groups at some mental age with groups where age or grade is held constant, regarding realistic vocational choices, suggests that mental age concept might be more meaningful than intelligence in…

This study based on a PhD dissertation submitted to Wayne State University, indicates a "conceptual distinction within conventional Pigetian conservation tasks...The results indicate that identity conservation is developmentally prior to equivalence conservation. (Author)

The research project is being supported by a grant from the Bureau of Research, U.S. Office of Education (OEC 6-10-235)