Evidence from twin studies points to substantial environmental influences on intelligence, but the specifics of this influence are unclear. This study examined one developmental process that potentially causes intelligence differences: learning to read. In 1,890 twin pairs tested at 7, 9, 10, 12, and 16 years, a cross-lagged…

Examines the question of whether environmental factors restrict only the capacity to perform the type of tasks schools require, or if they inhibit the general capacity to learn. (NH)

Part I of a 3-part report. See also AA 501 769 through AA 501 772.

This ecological study is one part of a broad research effort to understand the backgrounds and characteristics of culturally disadvantaged children. The study attempted to provide empirical data which could be used to describe differences in home environments and behavior of three young children from deprived and non-deprived homes. Focus was on…

IT IS PROPOSED THAT MENTAL RETARDATION IS NOT NECESSARILY CAUSED BY A GENETIC FACTOR OR BY BRAIN INJURY, BUT MAY BE CAUSED BY THE CULTURAL ENVIRONMENT IN WHICH CHILDREN ARE RAISED. WHEN CHILDREN ARE LEFT IN PSYCHOSOCIALLY DEPRIVED HOMES, THEIR RATE OF DEVELOPMENT WILL TEND TO DECLINE. IF, AT AN EARLY AGE, THEY ARE PLACED IN A SCHOOL FOR A FEW…

In this study, the relationship between a refined measure of the learning environment of the home and the levels and profiles of a set of mental ability scores of children from five Canadian ethnic groups was examined. Significant group differences persisted in the verbal, number, and reasoning scores. (Author/JMB)

Relates two strategies of compensatory education to the origins of educational deficits. (JM)

From the monthly Saturday Review supplement, "Education in America, sponsored by the Charles F. Kettering Foundation.

This paper examines evidence supporting the hypothesis that environment differentially affects intelligence in a sex-specific manner. The current position that environment and heredity contribute interactively to intelligence obscures the greater vulnerability and exposure of males to environmental influences and the reciprocal lack of equivalent…

The nature and specification of goals in teaching a group of concepts affect the type and quality of learning. What is learned is learned as a means to some end. Feedback from end to means regulates learning a given activity. The task or goal structure provided by the environment may play its most important role early in life and gradually decline…

A four-and-a-half-year longitudinal experiment reconsidered the contribution of organic impairment to the genesis of mild mental retardation among disadvantaged children. It was hypothesized that nonoptimal perinatal conditions might result in deficits that increase a child's vulnerability to environmental risk factors. Study results supported the…

Cognitive developmental learning is a concept expressing the hypothesis that learning has a continuing, cumulative, and transformational function in the development of intelligence. Two important questions are, "How much do we know about methods?" and "What classes of knowledge and abilities should we develop?" An analysis of past investigations,…

Much of our thinking about contemporary social problems reflects tacit presuppositions regarding the operation of heredity and environment in human behavior. These beliefs have important implications for practical decisions. Advances in genetics, psychology, anthropology, and other disciplines have contributed much to a clarification of the…