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Peer reviewedMeichtry, Yvonne J. – Journal of Research in Science Teaching, 1992
More than 1,600 middle school students, including an experimental group exposed to the Biological Science Curriculum Study (BSCS), were administered the Modified Nature of Scientific Knowledge Scale. Results indicate that the students utilizing the traditional science curriculum possessed a significantly better understanding of the testable nature…
Descriptors: Cognitive Development, Cognitive Measurement, Comparative Analysis, Control Groups
Peer reviewedMartin, Sandra L.; And Others – American Journal of Public Health, 1990
Preschoolers at high risk for intellectual impairment were enrolled in an educational day care program. Repeated testing, with a control group, demonstrated that such a program could lessen the incidence of retardation. (DM)
Descriptors: Control Groups, Day Care, Economically Disadvantaged, Enrichment Activities
Download full textFreedman, Stephen – 2000
The National Evaluation of Welfare-to-Work Strategies was conducted to explore whether programs examined in the evaluation have helped welfare recipients move into the labor force and remain employed over the long term. As part of the evaluation, a study was conducted to identify the 4-year impacts that 10 programs in 6 sites have had on former…
Descriptors: Comparative Analysis, Control Groups, Education Work Relationship, Employment Level
