This paper includes a nontechnical description of methods for calculating effect sizes in intellectual and developmental disability studies. Different hypothetical studies are used to illustrate how null hypothesis significance testing (NHST) and effect size findings can result in quite different outcomes and therefore conflicting results. Whereas…

The sophisticated analytical techniques available to institutional researchers give them an array of procedures to estimate a causal effect using observational data. But as many quantitative researchers have discovered, access to a wider selection of statistical tools does not necessarily ensure construction of a better analytical model. Moreover,…

This study examined three statistical methods for selecting items for mastery tests. One is the pretest-posttest method due to Cox and Vargas (1966); it is computationally simple, but has a number of serious limitations. The second is a latent trait method recommended by van der Linden (1981); it is computationally complex, but has a number of…

The purpose of this study was to replicate the Bentti, Golden, and Reigeluth study (1983), which explored the use of nonexamples to teach common errors as an effective strategy in teaching a procedure. A total of 24 undergraduate students enrolled in the Syracuse University Symphonic Band were randomly assigned to an experimental group and a…

Affective experiences have been shown to influence student self-concept and to influence and predict academic achievement. In the present research, two groups of seventh-grade boys and girls numbering 30 in all participated in either facilitated or directed affective experiences in which they explored personal feelings and attitudes toward school,…

The effectiveness of a computer-assisted system to deliver an introductory course on educational computing to preservice elementary and early childhood teachers was investigated in this study. The 33 subjects enrolled in a one-hour Computer Literacy for Teachers course during the spring semester 1986 at Indiana University of Pennsylvania, worked…

This investigation of the effect of computer-assisted instruction (CAI) on the learning of library skills hypothesized that there would be a substantial difference in the achievement of library skills by those students who received additional drill and practice through the use of CAI and those who received additional drill and practice only from…

The results of five studies of the relationship between debate training and critical thinking were examined to determine if in fact debate training improves critical thinking skills. All five studies compared the gains on the Watson-Glaser Critical Thinking Appraisal Test (WG) for subjects who had received debate training with control groups who…

The effects of mediated Logo programing instruction on preschoolers' comprehension monitoring performances were compared with a control group which received computer instruction via games designed to foster academic skills. Changes in self-monitoring were measured on verbal and nonverbal monitoring indexes during a referential communication task…

Investigates the effectiveness of videotape recording use in teacher education by comparing the progress of students who were videotaped while practicing classroom skills through microteaching with the progress of students who were not videotaped. The groups which used videotaping made significantly more progress in their mastery of specified…

Describes study of high school students that was conducted to determine whether instruction in a second programing language helps produce transfer of problem solving skills. The six dependent variables used in the study are discussed; pretests and posttests are described; and suggestions are made for further research. (36 references) (Author/LRW)

This study was designed to test the hypothesis that students who are given common errors matched with correct performance as part of their instruction in carrying out a procedure will perform better than students who are given only the correct performance. The task was the procedure for correcting color imbalances in color slides, and 56 college…

Children's developmental progress was studied to determine if location and types of services for handicapped preschoolers (classroom or home and classroom combined) were significantly related to child progress. Data indicated an overall trend for progress for all participating children, but neither service delivery model emerged as the superior…

A study of the effects of microcomputer use in classrooms and homes on the growth of school-readiness skills of kindergartners used pre- and posttested experimental and control groups to assess reading readiness, mathematics readiness, Piagetian operations, and keyboard knowledge. Teacher implementation strategies and techniques used by nonreaders…

A test of predicted anxiety which focused on public speaking was given before and after two life skills courses in an English college. The students' own reports and observations by the author supported the results, which indicated a reduction of anxiety in the course which used simulations. (Author/LRW)