Education experiments frequently assign students to treatment or control conditions within schools. Longitudinal components added in these studies (e.g., students followed over time) allow researchers to assess treatment effects in average rates of change (e.g., linear or quadratic). We provide methods for a priori power analysis in three-level…

The results of two experiments demonstrate that preservice teachers made biased school-placement recommendations depending on student's ethnicity, which on average penalized students from an ethnic minority. Moreover, additional information that was supposed to disconfirm ethnic stereotypes (religious affiliation in Experiment 1, number of missed…

Thus far, it is unclear how students can learn most effectively from their own errors. In this study, reflections on the rationale behind self-made errors are assumed to enhance knowledge acquisition. In a field experiment with pre/post/follow-up design, the authors practiced fractions with 174 seventh- and eighth-grade students who were randomly…

This experiment investigated whether study of a scientific text and a visual display that contained redundant text segments would affect memory and transfer. The authors randomly assigned 42 students from a university in the southwestern United States in equal numbers to 1 of 2 conditions: (a) a redundant condition, in which participants studied a…

In 3 experiments, undergraduates used their own best method (control) or an "imposed" face-name mnemonic strategy to associate 18 caricatured faces, names, and additional facts. On all immediate tests (prompted by the faces), and on the delayed tests of Experiments 2a and 2b combined, mnemonic students statistically outperformed control students…

Due to the clustered nature of field data, multi-level modeling has become commonly used to analyze data arising from educational field experiments. While recent methodological literature has focused on multi-level mediation analysis, relatively little attention has been devoted to mediation analysis when three levels (e.g., student, class,…

Article discussed the relevance for educational research found in the Type 11 error, one identified as a correct rejection of a 2-tailed test of hypothesis followed by an incorrect directional decision. (Author/RK)

The present study contrasted the robustness of the WSD and the F test to heterogeneity of variances. (Author)

Purpose of research was to examine the contribution that expectancy to teach could make as a possible incentive for meaningful verbal (school) learning. (Author)

The Peabody Picture Vocabulary Test is marketed as an instrument suitable for use by persons without special training in testing. A total of forty children, ranging from retarded to gifted, were tested in counter-balanced order by eight elementary school teachers and by three school psychologists. (Editor)

The contention of this paper is that the obtained difference in a study by DuCette and Wolk, which indicated that giving options in an essay examination produces poorer test performance, was an artifact of the scoring procedures. (Author/RK)

This study was conducted to determine if raters would use a single policy for determining the beauty of paintings and to demonstrate the JAN technique in an experiment where the predictors first had to be hypothesized and then a quantified measure ascribed to each. (Author/RK)

The question to be answered in the study was: Are there significant differences in learning when students are presented organizers before the learning passages (pre-organizers), after the learning passages (post-organizers), or when they are presented only the learning passages (no-organizers)? (Author)

This study was an experimental investigation of the effects on cognitive learning of training students to use behavioral objectives. (Editor)