An approach to determining the number of factors to be retained from a factor analysis using split-half factor comparabilities is presented. The use of this approach in determining proper factor rotation is also discussed. (JKS)

This Monte Carlo study was designed to investigate empirically the efficacy of three statistical strategies for estimating the relationships in extreme group designs in terms of estimation of correlation, power and mean square error for the correlation. Alf and Abrahams's "covariance information statistic" proved to be the best strategy.…

A synthetic presentation of the responses to a detailed questionnaire sent to French teachers all over the world. The report covers the following: (1) the extent of the inquiry; (2) geographical locations; (3) professional formation; (4) professional status; and (5) concluding summary. Many statistical tables are included. (AMH)

This research examines further the hypothesis that subjects tend to allot figures to the negative poles of constructs approximately 38 percent of the time. Sixty Canadian undergraduates judged 20 nonsense words as if these were the names of persons on 20 bipolar constructs. Results clearly supported the hypothesis. (Author)

The misleading character of the correlation coefficient was investigated in two studies of intuitive statistical behavior: subjective estimation of partial correlation and subjective estimation of the minimum possible correlation between two variables given their equal correlation with a third. (Author/JKS)

This study examines the relationship between frequency and type of social interaction and hostility toward ethnic groups. (Author/EB)

Simulation studies were used to explore the relationship between Type I error rates (statistical conclusion validity) and multiple testing in data sets exhibiting varying degrees of independence. Implications for reporting and interpreting educational data are discussed, and methods of determining or reducing Type I error incidence are presented.…

Highlights semantic links and shows how the semantic content of hypertext links can be used for information retrieval. Discussion includes indexing and retrieval algorithms that exploit link content and node content; retrieval strategies exploiting semantic links, including conventional retrieval and constrained spreading activation techniques;…

This article presents arguments that the correlation measure "r" of halo is not conceptually more appropriate than the standard deviation (SD) measure. It also describes conditions under which halo effects occur and when the SD and r measures can be used. Neither measure is uniformly superior to the other. (SLD)

A new approximation is proposed for testing the equality of "k" independent means in the face of heterogeneity of variance. Monte Carlo simulations show that the new procedure has nearly nominal Type I error rates and Type II error rates that are close to those produced by James's second-order approximation. (SLD)

A previous paper proposed a generalized family of coefficients of relational agreement for multiple judges. It focused on the concept of empirically meaningful relationships. This paper presents an ordinal coefficient of relational agreement as a special case of the generalized family. The proposed ordinal coefficient encompasses other ordinal…

Seven univariate procedures for testing omnibus null hypotheses for data gathered from repeated measures designs were evaluated, comparing five alternative approaches with two more traditional procedures. Results suggest that the alternatives are improvements. The most effective alternate procedure in controlling Type I error rates is discussed.…

A computer simulation compared significance tests of correlation coefficients calculated from initial scores, from ranks assigned by the Spearman method, and from three kinds of modified ranks. Implications of findings for the idea that rank correlation is a nonparametric correlation method are discussed. (SLD)

The use of structural equation modeling (SEM) with latent variables to address measurement error and to examine processes that may account for changes in observed outcomes in data from experimental studies is illustrated. An example from a Project Family study is provided; issues that arise in applying SEM procedures are discussed. (Author/EMK)

Discusses statistical analyses of the effect of reduction in opening hours on book issues, or borrowing, of public library authorities (PLAs) in the United Kingdom. Demonstrates the difficulties involved in using statistical data to make accurate predictions of the impact of opening hour reductions on borrowing. (Author/LRW)