The booklet addresses issues regarding the prevalence of mental retardation. Difficulties in obtaining prevalence figures are noted, specifically limitations of the use of the population curve. Prevalence studies are reviewed and methodological problems cited. Sex, age, and socioeconomic factors in the prevalence of mental retardation are…

Reevaluates literature on the development of transitive inference in light of theoretical and methodological criticisms, and examines two aspects of the Piagetian account of the development of this cognitive ability. Criticism leveled is based on the observations that ability to make transitive inferences is not age-related and that children and…

Discusses ambiguities in research that arise from the fact that chronological age reflects different components. Considers methodology, components of age as indices of different aspects of development, differential effects of experiences according to their timing, and maturational delay. (RJC)

Summarizes data on developmental patterns in constructive play--play in which children use play materials to make something. Reviews knowledge about developmental correlates and effects of constructive play behavior and examines methodological and theoretical issues. (NH)

Research on social markedness and second language pronunciation is reviewed, and some general conclusions are drawn. A number of issues arising from this research are identified and inherent difficulties in forming hypotheses, performing analyses, and interpreting data are discussed. (30 references) (Author/MSE)

A review of 20 United States studies of adolescent sexual behavior was undertaken to integrate data accumulated over the past three decades. Several methodological incongruities made comparisons difficult, so suggestions are made for future research. Available data suggest a gradual evolution, not a revolution, in adolescent sexual behavior.…

Provides a comprehensive summary of research literature on the accuracy of proxy reports of parental status characteristics. Tests four hypotheses in relation to the influence of the child-respondent's age, race, and gender and the parents' education or occupation on the accuracy of reporting. (LS/Author)

Provides an overview of ethical issues related to social research with children. Sets discussion in context of current debates in Britain and explores extent to which children should be regarded as similar to or different from adults, particularly children's supposed position as vulnerable, incompetent, and relatively powerless in society. Offers…

Reviews problems with early survey research methods. Recent studies are examined in terms of characteristics of the stimuli and contexts, and characteristics of the perceivers employed in them. Methodological and conceptual issues in these three categories are used to organize the body of research that exists. (Author)

The research literature on aging was reviewed to determine findings with direct implications for educational programs for older persons and findings with no direct application but that raise further research questions. The focus was on cognition and learning in later life, predominantly on work published during the past two decades in major…

Findings from several recent studies suggest that the gender, cultural background and age of observers may influence their perception and evaluation of nonverbal communication. There is ample evidence to warrant using raters of only one sex (preferably female) and only one cultural background when the rating task involves decoding nonverbal…

H.H. Spitz argues that interesting results from the preschool intervention of the Abecedarian Project continue to be disregarded. C.T. Ramey reiterates his earlier objections to Spitz's conclusions, and H.H. Spitz rejoins with specific objections to Ramey. (SLD)

Parents, educators, psychologists, and linguists are concerned about the effects of bilingualism on children, particularly young children. Although it is generally agreed that the minority-language child should develop bilingual and bicultural competence, there is disagreement concerning the role the two languages should play in the child's early…

Some methodological issues in the study of levels of knowledge are reviewed, and needs for further research are explored, drawing on an analysis of 12 studies reported since the late 1970s. In the 12 studies, 16 quantitative experiments were conducted. These were assessed for internal and external validity. Analysis revealed some shortcomings in…

Considers the problems inherent in researching changes in social values and individual perspectives among selected age groups. Asserts that studies aimed at researching both aspects need to be organized as longitudinal studies. Utilizes data taken from a study of East and West Berlin adolescents to reveal specific research problems. (MJP)