This paper investigated consequences of measurement error in the pretest on the estimate of the treatment effect in a pretest-posttest design with the analysis of covariance (ANCOVA) model, focusing on both the direction and magnitude of its bias. Some prior studies have examined the magnitude of the bias due to measurement error and suggested…

This article presents a method to evaluate pretest effects on posttest scores in the absence of an un-pretested control group using published results of pretesting effects due to Willson and Putnam. Confidence intervals around the expected theoretical gain due to pretesting are computed, and observed gains or differential gains are compared with…

Cognitive pretesting (CP) is an interview methodology for pretesting the validity of items during the development of self-report instruments. This article reports on the development and evaluation of a systematic method to rate self-report item validity performance utilizing CP interview text data. Five raters were trained in the application of…

Describes a program system which was developed for the purpose of making estimates about the nature of the distribution of test scores which will result from an administration of a test composed of items of which estimates of item-difficulty and discrimination are available. (Author/RC)

A nonparametric test of the hypothesis of no treatment effect is suggested for a situation where measures of the severity of the condition treated can be obtained and ranked both pre- and post-treatment. The test allows the pre-treatment rank to be used as a concomitant variable. (Author/JKS)

The relationship between a subject's awareness of the intent of the experimenter and attitude change is investigated. (PR)

A test of significance for identifying individuals who are most influenced by an experimental treatment as measured by pre-post test change score is presented. The technique requires true difference scores, the reliability of obtained differences, and their standard error of measurement. (Author/JKS)

High School seniors responded to two semantic differential instruments, containing dissimilar concepts purporting to measure the same variables, both before and after attending a college summer orientation program. Before-after component combinations were found to be highly similar. (Author/RC)

Although students quickly form reasonably lasting judgments of their instructors and courses they are also able to alter their judgments as warranted by changing situations. These findings appear to provide support for the validity of student evaluations. (Author/RC)