A classroom/laboratory exercise has been used to introduce college students to factorial research designs, differentiate between interpretations for experimental and quasi-experimental variables, and exemplify application of laboratory research methods to test practical questions (advertising claims). The exercise involves having randomly divided…

A statistical method has been developed for nested incomplete samples in a longitudinal study in which part of the sample has dropped out in such a way that the data have a nested pattern. A procedure which performed well in a Monte Carlo experiment was extended to a two-factor incomplete design with repeated measures on one factor. Methods…

Contemporary scholars researching the courts' impact on schools would profit from examining the well-funded studies conducted in the 1960s and early 1970s. This article discusses the substance of early judicial impact research and explores its relevance for today. Most 1960s impact studies dealt with United States Supreme Court decisions in three…

The present study investigated relationships between cognitive components of children's sex-role development and the bases of their attributions of sex-stereotypes to a particular gender. Specifically, it was predicted that the number of sex-stereotypes children correctly attributed would be significantly related to gender differences between the…

Questionnaire data from 81 North Carolina communities were analyzed in 1981 to test the hypothesis that 5 institutional subcategories (education, general community services, transportation, agricultural services, and health and sanitation) exhibit the underlying characteristic of unidimensionality and that they reflect comparable levels of…

This research paper based upon a thesis of the same title examines whether a statistically significant difference exists between computer literacy test scores for those students having a microcomputer in the home and those who do not. Relationships between student gender, adult education level, adult occupation, adult computer use, educational…

This paper proposes a method for studying the effect of an individual difference variable--field dependence-independence--on the ability of a student to read and understand text information presented on a computer screen. It is argued that in order to improve individualized instruction, learning must be related to predictions of what part of the…

The purpose of this study was to develop, implement, and evaluate an audiotape and accompanying handouts on hemodynamics as a supplemental teaching aid in the Health Science Learning Center of New York City Technical College. It was hypothesized that there would be a significant difference between the mean examination grade on hemodynamics of…

In this study, 104 primarily indigent primiparous mothers from urban and rural areas and their healthy, full-term neonates were placed in one of four conditions during the normal postpartum lying-in period. Conditions were control, initial contact, rooming-in, and initial contact plus rooming-in. Dependent variables consisted of scores on the…

This study investigated the effects of different structures of a synthesizer and formats of the generality component on the application and remember levels of learning. Seventy-three undergraduates participated. Four treatment groups were formed by combining two types of structure (complete versus partial) with two types of format in generality…

Lawrence Walker's (1984) meta-analysis of 108 samples concluded that there are no sex differences in stages of moral reasoning. This paper reviews Walker's work and points out that some of his analyses, however, are controversial and favored unwarranted conclusions. Walker neither tested the hypothesis that males are more advanced than females in…

A Monte Carlo simulation was used to ascertain the degree of inflation that can occur in regression estimates when samples contain randomly occurring instances of a pattern among correlations called cooperative suppression. Ten thousand samples of scores on three variables were randomly drawn from a population in which the correlations among the…

The state of the art in observational studies is discussed, with emphasis on explanatory research--studies of program effectiveness in which an attempt is made to explain the reasons for the results as well as describing the results. In addition to the collection of data and presentation of statistical facts, the explanatory study involves the…

The purpose of this study was to investigate the effects of protagonist's sex on moral reasoning ability. The moral reasoning of 335 white, middle class high school and college students was assessed by Rest's Defining Issues Test (DIT), in either its traditional format (all male protagonists) or an experimental version (all female protagonists).…

The findings from two studies (Pre-Post and Matched-Pairs) suggest that the mini-instructional system that was designed to provide teachers with training in the analytic-pluralistic approach to classroom management did have a very positive impact on those teachers who received this training. The mini-instructional system is one in which classroom…