Data on the Piers-Harris Children's Self-Concept Scale from a sample of educable mentally retarded elementary school students were factor analyzed. Results indicated some support for the factor validity of the instrument. (JKS)

The validity of the Study Practices Inventory (SPI) for a group of entering pharmacy students was assessed. The four subscores of the SPI showed moderate correlation with entering grade point average and with measures of reading ability. (Author/JKS)

The Image of Science and Scientists Scale was developed to assess high school students' attitudes toward science as a field of study. Reliability and three types of validity evidence are reported for the scale. (Author)

Eight ambiguous items in the 16-item Inconditionality of Regard Scale of the Barrett-Lennard Relationship Inventory were rewritten to see if the relationship of that scale to others in the inventory would change. The hypothesis that the relationships would change was upheld. (The eight original and eight modified items are included). (JKS)

Scores from the Comrey Personality Scales were related to scores from the Personal Orientation Dimension for a sample of alcoholic inpatients. Results supported the findings of an earlier study and helped to clarify the construct validity of the instruments. (Author/JKS)

A 20-item scale, based upon the Estes Reading Attitude Scale, was constructed to measure elementary students' attitudes toward reading. Results supported its reliability and validity for third, fourth, and fifth graders. (The scale is included). (JKS)

The PM statistical index, which indicates the probability that a person will belong to a particular clinical class, is described. The coefficient is similar to the G index but is easier to compute. An empirical example is presented. (JKS)

The Sixteen Personality Factor Questionnaire, Gordon Personal Profile, and Gordon Personal Inventory were administered to 151 male and female high school students. Multiple regression analysis indicated that the personality scales of each test could be predicted from the scales of the other tests. (Author/JKS)

A problem of considerable importance in certain educational settings is determining how many items to include on a mastery test. Applying ranking and selection procedures, a solution is given which includes as a special case all existing single-stage, non-Bayesian solutions based on a strong true-score model. (Author/JKS)

The G index is a measure of similarity between pairs of dichotomized items. The G index is generalized here to the case where items are trichotomized. (JKS)

It is shown how partial covariance, part and partial correlation, and regression weights can be estimated and tested for significance by means of a factor analytic model. Comparable partial covariance, correlations, and regression weights have identical significance tests. (Author)

A problem in analysis of variance is that after rejection of the overall hypothesis, no contrasts of interest are found to be significant. A procedure for determining the contrast of significance is outlined, and the relationship between the "most significant" contrast and the overall test is shown. (Author/JKS)

Details are given for the use of the mixed effects multivariate analysis of variance table provided by the BMD12V computer program to compute raw generalized variances and hence the U and F statistics for the mixed effects model. (Author/JKS)

A simple rationale for Scheffe's Method and Gabriel's Simultaneous Test Procedure is presented. Examples of both methods are provided. (Author)

The effect of stratified sampling of items based on item difficulty and/or interitem correlations on the estimation of test score distribution parameters using multiple matrix sampling was studied. Results indicated that stratification did not consistently improve the stability of parameter estimation. (Author/JKS)