This paper is a preliminary report of objective test results made by approximately 300 poor and 100 non-poor kindergarten children and by 417 first grade children during 1968-1969. Tests administered to the kindergarten classes in the fall of 1968 and again in the spring of 1969 were: short-form Wechsler Preschool and Primary Scale of Intelligence…

Piaget's organismic-developmental theory of intelligence was investigated in this study to determine the effectiveness of training middle class 3 and 4 year olds on two logico-mathematical structures: classification and seriation. Twenty-four children were divided into two main age groups (mean ages: 3 years 8 months; 4 years 5 months). Within…

This book is a collection of papers presented at the symposium, "Conference on Ordinal Scales of Cognitive Development, sponsored by the California Test Bureau. Papers include: "The Theory of Stages in Cognitive Development" (J. Piaget); "Two Approaches to Intelligence: Piagetian and Psychometric" (D. Elkind); "An…