Joreskog's procedure for the analysis of simplex models was used to test Humphreys' assertion that eight semesters of undergraduate grade point averages have a simplex form. The assertion was confirmed, and precise estimates of unattenuated correlations and reliabilities were also obtained. (Author/JKS)

Results of a study to determine whether paired-comparisons i intransitivity is a function of intransitivity associated with specific stimulus objects rather than a function of the entire set of stimulus objects suggested that paired-comparisons intransitivity relates to individual differences variables associated with the respondent. (Author/CTM)

Psychometric characteristics of the test scores of 5,663 examinees on six patient management problem tests were studied. The total scores can be divided into subscores based on all options keyed "select" and "omit." Component scores are generally correlated negatively, as reflected in reduced discrimination indices and…

Stability of measurement of basic achievement skills in reading and mathematics was evaluated for a large special education population. Test-retest coefficients reflected adequate stability for a national sample of hearing-impaired students. The major handicapping condition of the population did not differentially affect measurement stability.…

A single-administration classification reliability index is described that estimates the probability of consistently classifying examinees to mastery or nonmastery states as if those examinees had been tested with two alternate forms. The procedure is applicable to any test used for classification purposes, subdividing that test into two…

The authors of this article contend that the Guinan and Foulds study was inadequately designed and executed, and the results indicate little of the "usefulness" of the test, much less illuminate the important hypothesis central to the investigation. Specific suggestions for further research in marathon group evaluation are made. (Author)

Purpose of this study was to examine the effects of the true change-true initial score correlation on one aspect of the true simple change estimate, namely its error variance. (Authors/CB)

This study investigated the reliability and validity of the Philosophical Belief Inventory (PBI). With the exception of the relationship between idealism and pragmatism and realism and existentialism, the PBI scales appear to be assessing independent facets of belief. (Author)

This report is based on a paper presented at the annual meeting of the Educational Research Association of the New York State, Kiamesha Lake, New York, November 7, 1968

Administered the Survey of Reading Attitudes to 235 intermediate-grade students in a suburban parochial school. Results indicate the development of reading attitudes is influenced by a variety of variables, and suggests school systems should determine their own local norms for the eight dimensions measured by the survey. (Author/RC)

A method for computation of dominance relations and for construction of their corresponding hierarchical structures is presented. The link between dominance and variance allows integration of the mathematical theory of information with least squares statistical procedures without recourse to logarithmic transformations of the data. (Author/CTM)

A class of naive estimators of correlation was tested for robustness, accuracy, and efficiency against Pearson's r, Tukey's r, and Spearman's r. It was found that this class of estimators seems to be superior, being less affected by outliers, reasonably efficient, and frequently more easily calculated. (Author/CTM)

Ten item discrimination indices, across a variety of item analysis situations, were compared, based on the validities of tests constructed by using each of the indices to select 40 items from a 100-item pool. Item score data were generated by a computer program and included a simulation of guessing. (Author/CTM)

The determination of a consensus ranking of products based on the rankings of each judge can be accomplished through the use of a Tukey type multiple comparison procedure. The extension to more than two groups is presented as an analysis of concordance table. (Author/CTM)