The stability of bias estimates from J. Schueneman's chi-square method, the transformed Delta method, Rasch's one-parameter residual analysis, and the Mantel-Haenszel procedure, were compared across small and large samples for a data set of 30,000 cases. Bias values for 30 samples were estimated for each method, and means and variances of item…

"Outlier studies" identify items for which extreme differences in performance by contrasting groups occur; these extreme items are the "outliers" referred to. Review of the studies conducted on tests receiving major use in higher education reveals that though one cannot make a priori classifications of outliers with confidence,…

This paper describes a longitudinal research study on the development of sextyping in adolescent females during their sophomore, junior, and senior years of high school. Each fall the test group of 65 females was administered the Bem Sex Role Inventory. Respondents whose self-perception was characterized as feminine demonstrated consistency across…

Describes a study that used interviews to explore the influence of personality, subject discipline, and organizational structure on the information behavior of scientists. The use of cluster analysis to reveal groupings in the data is explained, computer use is examined, and gender differences are discussed. (60 references) (LRW)

This study identified behaviors of sibling pairs interacting on a cognitive task and related these behaviors to sibling structure variables (age and sex of each sibling and age spacing between them) and to measure of cognitive abilities of the younger sibling. Subjects were 160 sibling pairs randomly selected from appropriate subpopulations of…