The literature on crowding in residential and laboratory settings is reviewed, and a model of crowding highlighting the importance of perceived control and group orientation is discussed. (EF)

The Laboratory of Comparative Human Cognition has found that, if cross-cultural psychology has mounted a challenge to developmental psychology, it is because it has forced recognition of the fact that no context of observation, including the laboratory, is culturally neutral. Settings for behavior are embedded in larger systems of social…

Reviews research related to laboratory work and makes recommendations for the classroom on how to make labs more meaningful. Argues that pre- and post-laboratory discussions containing theory behind the lab and purposes of the lab are essential for new understanding. (DDR)

The logical flaw of using the methods of path analysis and structural equation modeling to make causative conclusions is demonstrated. A proper evaluation of the role of investigation versus experimentation is cited in the work of W. G. Cochran as explicated by D. R. Rubin (1983). (TJH)

Explores the neural and hormonal basis of human intellectual function that gives rise to sex differences in the brain. Discusses behavioral, neurological, endocrinological studies, and studies of the effects of hormones on brain functioning that show a relationship between cognitive variations and sex. (MCO)

Discusses computational studies of learning in artificial neural networks and findings that may provide insights into the learning abilities of the human brain. Describes efforts to test theories about brain information processing, using artificial neural networks. Vignettes include information concerning how a neural network represents…

The objectives of this study are: (1) evaluation of the methodology used in recent search for particles with fractional electrical charge (quarks) and its implications for understanding the scientific research methodology of Millikan; (2) evaluation of 43 general physics textbooks and 11 laboratory manuals, with respect to the oil drop experiment,…

This document discusses the creation of a new formal language for the field of counseling psychology. Constructs for such a language are applied specifically to the communication of research information (especially research concerned with the effects of counselor action on clients) for experimental replication. Grammatical concepts of a formal…

Considers the origins and development of the textbook view of causality and experiment by examining the various editions of Woodworth's PSYCHOLOGY (1921-1947). Examining the gradual emergence of the experiment-causality relationship, Winston contends that introductory textbooks oversimplify the concept of causality and he explores possible…

Describes effects which produce the semidiurnal tidal bulges, using elementary methods, without reference to fictitious forces and without recourse to a potential. (Author/HM)

Suggests that experimental studies are valuable in analyzing children's language development. Criticizes the scarcity of experimental and naturalistic investigation into preschool language development. Calls for long-term study of continuity and discontinuity in children's school and home learning and between different school stages. Observes that…

Summarizes evidence for the effects of class-size reduction from experimental and nonexperimental measurements, addresses questions about the robustness of each type of estimate, and suggests hypotheses that could reconcile differences resulting from conflicting evidence. Discusses potential costs and the implications for future research into the…

Experimental studies conducted since 1980 were reviewed. Each of the 34 studies concerning problem solving is briefly summarized, followed by comments, criticisms, and/or concerns. A summary indicates that experimental research of the 1980s seems to focus on: (1) children's processes, understanding, functioning, difficulties, and representations;…

Describes a method to determine the thermal diffusivity of a polymer, which is suitable for the undergraduate laboratory. It serves as a practical demonstration of classical Fourier theory. (Author/HM)

A descriptive analysis of research practices and a meta-analysis of control group effect sizes are used to address Hawthorne effects in educational experiments. The analysis of 86 studies and 256 treatment/Hawthorne/no-treatment control group effect size comparisons indicate that artifact controls have limited utility in dealing with the Hawthorne…