The methodology suggested in this paper employs a selection rule for identifying group members that generates groups that have a range of achievement within groups but equal distribution of raw scores between. (Author/BW)

Guidelines for protection of human subjects in survey research demand that research designs provide for subjects'"informed consent." This paper reports procedures employed within a study of marijuana and other drug use which were in compliance yet avoided problems of nonparticipation and the gathering of inaccurate information. (Author)

A QuickBASIC program is described that can be used to conduct Dunnett-like comparisons on a set of independent proportions. The statistical method used, based on Levy's statistical method (1975), is an extension of the well-known Dunnett test for multiple comparisons on means. (Author/SLD)

A formula that is simpler to calculate than the Kappa statistic of J. Cohen is presented for the situation where each subject in an experiment is rated on a nominal scale by two or more judges. Equivalence with Pearson's chi-square statistic in this situation is demonstrated. (SLD)

A total of 685 articles in "Mental Retardation,""American Journal of Mental Deficiency," and "American Journal on Mental Retardation" from 1980 through 1989 were examined. The mental retardation classification system developed by the American Association on Mental Retardation was used in over 50 percent of the…

The effect of reducing the number of score groups in the matching criterion of the Mantel-Haenszel procedure when screening for differential item functioning was investigated with a simulated data set. Results suggest that more than modest reductions cannot be recommended when ability distributions of reference and focal groups differ. (SLD)

This study examined the influence of challenge-based recreation on the collective efficacy of families with at-risk adolescents. Thirty-four families participated in one of three experimental groups and a control group. Collective family recreation efficacy and conflict resolution efficacy increased for families in all three recreation contexts.…

The purpose of this study is to demonstrate that performance assessment increases educational value in teaching-learning activities using a quasi-experimental research design. In this research, the three measurement criteria of educational value are suggested as "improvement & advancement," "sincerity & enthusiasm," and "individuality &…

The purpose of this study was to assess phonological and morphosyntactic change in children with co-occurring speech and language impairments using different goal attack strategies. Participants included 47 preschoolers, ages 3;0 (years;months) to 5;11, with impairments in both speech and language: 40 children in the experimental group and 7 in a…

A tuition-free, vocational, English as a second language (ESL) program offered at a large community college suffers from high attrition as well as student dissatisfaction with curriculum. The purpose of this quasi-experimental, longitudinal study was to assess the effectiveness of a specific ESL curriculum supplement as an intervention to…

Medical schools have reduced the time allotted to anatomy instruction. Consequently, schools engage students in more independent settings using information and communication technologies (ICT). There has been limited research in the use of video aids, a type of ICT, to enhance anatomy examination performance. The objective of this study is to…

Although reattribution training has been shown to be very useful in improving learning, researchers disagree on what mediates the effects. As to the possible mediating factors, the prominent theories suggest factors such as expectations, notions of intelligence, self-efficacy or anxiety. However, this article proposes an alternative mediating…

The purpose of this study was to investigate the effects of multiple intelligences (MI) teaching approach on 8th Grade students' achievement in and attitudes toward science. This study used a pretest-posttest control group experimental design. While the experimental group (n=30) was taught a unit on acids and bases using MI teaching approach, the…