The purpose of this study was to investigate the effects of practice on relevant components of selected operations on a child's ability to conserve substance and weight. A group of 108 children between the ages of five and seven was selected from one school and pretested for conservation of weight and substance. The 48 non-conservers were then…

This study attempted to determine if performance on Piagetian tasks can be predicted from Stanford-Binet mental age or IQ. Subjects were 143 children of bright, average, and retarded abilities as measured by performance on the Stanford-Binet Intelligence Test. Bright and average children were chronologically aged five to seven years; retarded…

Following a review of research on the effects of early experience upon subsequent cognitive and intellectual development, an alternative Piagetian-based strategy for the study and evaluation of these concerns is presented. Using this paradigm, infants were observed naturalistically for one year. The observations were coded according to the four…

The present volume reflects the proceedings of the fourth annual symposium at the Carnegie-Mellon University, which dealt with developmental linguistics in general and with child language acquisition in particular. Contents include an Introduction by John R. Hayes; "Derivational Complexity and Order of Acquisition in Child Speech," by R. Brown and…

Concurrent with the increasing interest in the training group (T-Group) as a source of growth and personal awareness for its participants, is a need to examine the effects of the T-group on certain personality types. This paper presents a rationale for examining the effects of the T-group on introverts and extroverts. Two T-group styles were…

The purpose of this study was to investigate the Ivanov-Smolensky procedure as an effective clinical device for the assessment of cognitive development in children under four years old. This procedure, expressly developed for assessing development in children with limited verbal skills, minimizes some of the research problems associated with young…

The sixth paper in the science series of research reviews produced for the Science and Mathematics Education Information Analysis Center concerns research in science education at the elementary school level published in 1968-69. The following topics are reviewed: Effects of instruction in new elementary science programs (Science - A Process…

The cognitive development of 30 24-month-old children who had entered residential care before the age of four months was compared with that of 30 working class children matched for age and sex who were living at home in London. Before testing, the children's fear of strangers was rated in a standardized situation. The mean mental age of the…

In this essay, research done on concept learning is discussed. The study analyzes concept learning as one form of learning, formulating guidelines for teaching concepts, and describes the abilities underlying the attainment of concepts. An analytical model is presented; various operations such as concrete concepts and identity concepts are…

This study sought to determine whether a number of specific counting and numeration behaviors emerge within children in a fixed developmental sequence; at what point in the development of mathematical behavior the use of numerical representations normally appears; and what relationship holds between development of counting skills and development…

As a preparatory step to the design of a preschool curriculum, this study examines three of the complex cognitive behaviors exemplified by the concrete operations period and its developmental prerequisites. Middle-class children in a university laboratory nursery setting were pretested, matched for age and randomly assigned to an instruction or a…

Reported is a study of the importance of the direct manipulative experience in the attainment of science process skills for kindergarten and grade three pupils. Typical self-contained classes were selected to learn exercises from Science - A Process Approach. Some pupils were allowed to manipulate science materials in learning, while others were…

First-grade students' understanding of several basic measurement processes was examined. Twenty randomly selected students from five first-grade classes in two different schools were individually examined on 11 measurement tasks. Seven of the tasks were adapted from items reported in the Gal'perin and Georgiev study, designed to test understanding…

The author explores some germane implications of cognitive consistency theory. An "affective-cognitive consistency" theory, which specifies the relationship between the affective and cognitive components of the attitude structure, was taken as the theoretical basis of this study. The theory suggests that by knowing what a person values, it should…

The purpose was to examine the assumption that all children of various abilities can profit from instruction demanding activity on a variety of cognitive levels. Two groups of about 40 sixth graders each were chosen by their scores on the "Analysis of Learning Potential." Students were classified as having high or low success potential. A series…