The paper provides an analysis and synthesis of studies with hearing impaired and other populations concerning the cognitive development of the principle of liquid horizontality--the idea that still water remains invariantly level regardless of the angle of the container. Three major questions focused the investigation: (1) What are the effects of…

A "best evidence" review synthesis, which incorporates features of meta-analytic and traditional literature reviews, is used in this review of studies on the effects of ability grouping on secondary school students' achievement. The focus was on 29 studies that compared between-class ability grouping to heterogeneous placements. Effect sizes were…

Statistical methodologists have sometimes criticized the use of conventional statistics in meta-analysis, and in recent years a number of them have advocated the use of a special new statistical methodology for research synthesis. An examination of recent books describing this methodology shows that it is seriously limited in its applicability to…

This first volume in a two-part report reviews completed and proposed research studies on learning needs and problems in primary education and describes research proposed for Afghanistan, Australia, Bangladesh, India, the Republic of Korea, Malaysia, Nepal, Pakistan, the Philippines, and Thailand. An introductory chapter considers the following…

Separate meta-analyses have been completed recently on the effectiveness of computer-based education (CBE) in elementary schools, high schools, colleges, and nontraditional postsecondary institutions. Several conclusions can be drawn from these meta-analyses. First, although CBA has not been uniformly successful in all its guises and at all…

A meta-analysis was conducted of 29 comparative studies located primarily through computer searches of Comprehensive Dissertation Abstracts and ERIC. Studies chosen took place in actual elementary classrooms, reported measured outcomes for both computer-based education and control classes, and were free from methodological flaws. A total of 21…

The status of recent research on staff development and inservice education for teachers, administrators, and other school personnel was reviewed in studies completed between 1977 and 1984. More than 400 articles from 23 professional journals and 507 doctoral dissertations were analyzed. For each study, the research design and procedures, purposes…

This digest provides an overview of several meta-analysis studies which focused on various aspects of science instruction. These studies examined: productive factors in science learning for grades 6 through 12; quality and quantity of instruction; effects of various teaching strategies on science achievement; instructional systems in science…

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 literature search identified 39 studies assessing modality preferences and modality teaching. The studies, involving 3,087 disabled and nondisabled elementary/secondary level subjects, were quantitatively synthesized. Subjects receiving differential instruction based on modality preferences exhibited only modest gains. (Author/JDD)

Eighty-nine federally funded demonstration programs for child abuse and neglect treatment (involving 3,253 families) were studied. Results are given for effectiveness of various services for abusers/neglectors and for the involved children, and for treatment success rates for abusers/neglectors. In general, treatment efforts were not very…

Evidence of the efficacy of developmental therapy is examined through a literature review of meta-analytic and single-subject research. Future research directions for evaluating the effectiveness of early physical therapy and occupational therapy are discussed, such as criterion-referenced outcome measures and functional outcome measures.…

A meta-analysis of 31 studies found financial aid to have a small, but significant, positive effect on student persistence, enabling lower-income students to persist at a rate roughly equal to that of middle- and upper-income students. (Author/MLW)

A meta analysis of preschool intervention programs is performed to arrive at an overall effect size of such programs. Results indicate that despite the diversities in intervention sites, ages of subjects, lengths of intervention, and curricula models, there is a positive homogeneous effect on the variables. (Author/LMO)

Student outcomes were assessed by quantitatively combining results of 57 reported evaluations of three major curriculum programs in elementary school science. Thirty-two percent of the comparisons were statistically significant, favoring activity-based programs; six percent favored control groups. (DH)