The concept of the single group experimental research design is to test the null hypothesis that there is no significant difference between the achievement of the pupils under the experimental treatment and their achievement at their previous rate of progress. (Author)

Describes possible curriculum evaluation designs, and the reasons for choosing a randomized control group design for evaluating the Physical Science for Nonscience Majors course. Outlines procedures used in this evaluation. (AL)

Problems in making inferences from a sample to a population and from one cohort to other cohorts are discussed. It is concluded that in most cases a longitudinal design using repeated measures is preferable to an independent samples design. (Author)

The approach to outcome research described here has the double merit of preserving individuality and permitting pooling of data for overall analysis of results. (Author)

Structural grammars are seen to have a definite place in child development research aimed at the development of tests and language programs designed to alleviate child language problems. (Author/KW)

A graduate educational research methods class assessed selected effects of instruction on research consumership and compared four types of assignments requiring research article appraisal. (Author/MF)

"A partial replication and extension of Bruner and Kenney's (1966) study of the concept of proportionality was run with 5- and 7-year-old children... Results demonstrated importance of avoiding verbal ambiguity in the investigation of nonverbal cognitive competence. (Author)

The statistical power of nine k-sample tests against ordered location alternatives under completely randomized designs are investigated. The results are intended to aid researchers in selecting appropriate statistical procedures. (Author/JKS)

An alternative analysis of the two-group single response variable design is proposed. It involves the classification of experimental units to populations represented by the two groups. Three real data sets are provided to illustrate the utility of the classification analysis. A table of sample sizes required for the analysis is presented.…

This paper reviews the distinctions between classical and partial eta square and derives a formula for use in those complex analysis of variance designs in which the investigator desires a measure of classical eta square and has access only to the F-tests and relevant degrees of freedom. (Author/BW)

Reexamines the article by Atkinson, Furlong, and Wampold (1982) and questions their conclusion that reviewers were biased toward statistically significant results. A statistical power analysis shows the power of their bogus study was low. Low power in a study reporting nonsignificant findings is a valid reason for recommending not to publish.…