Considers the use of instrumental variables to estimate effects of treatments on treated and randomly selected groups. Concludes that instrumental variable methods are extremely sensitive to assumptions about how people process information. (SK)

A review of the literature is presented on developmental mathematics courses in two- and four-year colleges and universities. The paper is organized within the categories of status studies, placement, program evaluation, class management, student characteristics, and thought processes. Highlights of the report include: (1) an average of 2.0…

In the first part of the paper, some realistic expectations about schools and curriculum development, the conditions which preclude applying the standards of basic research to evaluate a program of instruction in large school systems, and some new research paradigms which have emerged from practice are defined. In the second part, an effort is…

Reviews the research on the effectiveness of five thinking skills training programs: Instrumental Enrichment, Philosophy for Children, Structure-of-Intellect (SOI), Problem Solving and Comprehension: A Short Course in Analytical Reasoning, and Odyssey. Compares and contrasts the content of each program and describes the relative lack of adequate…

Arguing that summaries of 562 studies from 1985 through 1994 reveal that almost no attention is paid to the cognitive effects of Head Start programs, this report criticizes Head Start as being steadily and more generously funded without evidence that it helps children's scholastic achievements. The report criticizes available studies as practicing…