Comments on a journal article that suggests that educational statistics may be compared even in cases where different experimental units are used in the analyses. (MLH)

The importance of reporting explained variance in ANOVA designs is discussed. Three methods that can be used to obtain estimates of explained variance in ANOVA designs are described and applied to sixteen studies that were reported in recent NARST volumes. Recommends that researchers in science education report explained variance. (Author/DS)

Discusses the problem of choosing the proper unit (e.g., class or individual student) for the statistical analysis of educational research. Describes a study that was statistically analyzed eight different ways and discusses the various results and implications. Suggests that the problem of selecting the proper experimental unit may be less…

Discusses three weaknesses in reporting research findings by commenting and criticizing research articles published in the eighth volume of Journal of Research in Science Teaching. (CC)

Discusses quasi-experimental and experimental research methodologies for investigating the relationships among teacher behavior, teacher competencies, student achievement, and student attitude outcomes. (MLH)