The logic and procedures underlying a disturbance term regression test of logical consistency for structural models are reviewed for recursive and nonrecursive designs. It is shown that in a simple three-variable, complete mediational case the test procedure is mathematically equivalent to a part correlation. (Author/LMO)

In order to make parallel analysis more accessible to researchers employing principal component techniques, regression equations are presented for the logarithms of the latent roots of random data correlation matrices with unities on the diagonal. (Author/LMO)

Compared two types of empirical study with two types of conceptual research on the validity of the Rorschach. Argues that the Rorschach does have some validity and that poor research is at least partly culpable for the Rorschach's perceived failure. (Author/BL)

This note shows that, contrary to what has been claimed, Bentler and Bonnett's nonnormed fit index is dependent on sample size. Specifically for a constant value of a fitting function, the nonnormed index is inversely related to sample size. A simple alternative fit measure is proposed that removes this dependency. (Author/LMO)

Randomization tests involve generating all possible assignments of subjects to treatments in order to create a distribution of possible test statistics. The use of a premutation group to enhance the understanding and utility of randomization tests is discussed. (Author/JKS)

Twenty-three different methods of cluster analysis were compared in a four-stage sequential validation design. Results demonstrated that the solution given by Ward's method of cluster analysis was particularly powerful in comparison to solutions yielded by other techniques. (Author/JKS)

Rorschach protocols of all inpatients since 1960 known to have committed suicide either during or subsequent to hospitalization (n=12) are compared with the Rorschach protocols of a closely matched control group. The results suggest that the presence of transparency and cross-sectional representations is a reliable indicator of suicidal intent.…

The assumption that an organization structure takes on the shape of a pyramid was tested using an index of organization shape. (Author/LR)

Discusses alternative forms of the desirability distribution for library materials and demonstrates the differences in short- and long-term patterns of frequency distribution in the circulation of library materials. Four figures, an appendix on statistical models for library circulation, and a reference list are included. (Author/JL)

Lists library annual reports and statistical documents available from three sources: ERIC, the National Technical Information Service (NTIS), and the General Microfilm Company's (GMC) State Documents Relating to Libraries series. (Author/FM)

Two applications of Kristof's theorem on traces of matrix products are presented in order to highlight their utility for psychometric theory and studies. (Author/JKS)

A methodology is proposed to optimize the training classification performance of any suboptimal model. The method, referred to as univariate optimal discriminant analysis (UniODA), is illustrated through application to a two-group logistic regression analysis with 12 empirical examples. Maximizing percentage accuracy in classification is…

In confirmatory factor analysis (CFA), models exist that are admissible and demonstrably identified where the factor loading matrix from latent to manifest variables is of less than full column rank, even though other models are not identified. Implications for CFA are discussed. (SLD)

This paper reflects on a process evaluation of a home visitation programme in South Africa. The programme, implemented in two low-income communities, focused on the reduction of risks to unintentional childhood injuries. The evaluation comprised a combination of qualitative and quantitative methods, including observations in conjunction with an…

Canonical correlation analysis is illustrated and three common fallacious interpretation practices are described. Simply, canonical correlation is an example of the bivariate case. Like all parametric methods, it involves the creation of synthetic scores for each person. It presumes at least two predictor variables and at least two criterion…