Pretest-posttest experimental designs are often used in randomized control trials (RCTs) in the education field to improve the precision of the estimated treatment effects. For logistic reasons, however, pretest data are often collected after random assignment, so that including them in the analysis could bias the posttest impact estimates. Thus,…

Introductory psychology students were subjects in an investigation to determine the covariation among achievement, attitudes toward a course, and attitudes taught as part of a course. In addition, data obtained allowed for evaluation of two theoretical models of pretest sensitization, the first in terms of learner involvement and the second in…

A sizable representative subsample of the standardization group for the Metropolitan Achievement Tests participated in both the Fall and Spring standardization programs. Fall and Spring test records were matched for all such pupils and Fall-Spring "growth expectancies" were derived. Additionally, the sample was split into three subgroups…

It is unsafe to estimate achievement test norms for fall testing by linear interpolation between norms for the previous spring testing and norms for the following spring. Second grade students were tested in reading and arithmetic in the fall and in the spring to provide pre-test and post-test data for evaluation of academic growth. Three…

To meet several pre-evaluation goals of the national Emergency School Aid Act (ESAA) Evaluation study, the following activities that were undertaken are described: selection of an achievement measure; a pretest of this measure to assess student needs in schools eligible to receive funds under the Act (schools with a minority enrollment of 50…

The study compares the content retention by students who are self-paced with content retention by students whose pacing is modified by instructors. The subjects included 148 students enrolled in an introductory college level child development course. One group of 74 students was randomly assigned to a self-paced section and another group of 74…

When two groups, initially dissimilar, undergo different treatments, can subsequent differences be partitioned in such a way that the difference between the two treatments is unbiased? This is the central problem of this paper, and it is confronted by the examination of two levels of information using a Follow Through Evaluation. The first…