This paper is based on data from Work Unit UTILITY research on job performance of men at different ability levels. The paper deals with data testing performance in four jobs: Armor Crewman, Vehicle Repairman, Supply Specialist, and Cook, of various Armed Forces Qualification Test (AFQT) levels over specified periods of time. (Author)

Two measures of the number of factors that a variable should load on are discussed. One is Kaiser's simplicity index, the other is called a complexity index, developed by the author. Similarities and differences are discussed. (JKS)

In this paper, the author gives a review of the literature on complex multivariate distributions. Some new results on these distributions are also given. Finally, the author discusses the applications of the complex multivariate distributions in the area of the inference on multiple time series. (Author)

The proposed coefficient is derived by assuming that the average Goodman-Kruskal gamma between items of identical difficulty would be the same for items of different difficulty. An estimate of covariance between items of identical difficulty leads to an estimate of the correlation between two tests with identical distributions of difficulty.…

Three measures were found to contribute significantly to the prediction of comprehensibility: mean linguistic depth, the number of self-embedded structures in the sentence, and the number of conjoinging transformations in the derivational history of the sentence. (Author/FB)

According to a new classification schema, data were obtained from both adults and children on article usage in English. The sample included children in the initial period of article acquisition (from two to three years of age). Results are discussed in terms of age differences and children's levels of difficulty. (MP)

The Relative Difficulty Ratio (RDR) was developed as an index of test or item difficulty for use when raw score means or item p-values are not directly comparable because of chance score differences. Computational RDR are described. Applications of the RDR at both the test and item level are illustrated. (Author/BW)

To examine the hypothesis that children's difficulties on traditional perspective-taking tasks are in part due to intellectual realism (inappropriately including what is known to exist in a representation of what is seen), 60 three-, four-, and five-year-old children were asked to select representations of various arrangements of blocks.…

The speech of five stutterers ranging in age from 3 years, 10 months to 5 years, 7 months was analyzed to determine the types of loci of stutterings. The results related to the hypothesis that early stuttering represents mainly a type of difficulty in either the formulaton or the execution of syntactic units. (Author)

The use of high-level questions increased the high-and low-level understanding of fifth graders. Competitive environments produced significantly greater high-level understanding than did cooperative environments. (Editor)

Suggests that certain kinds of writing assignments encourage children to engage in writing at a higher than usual level of syntactic complexity. (DD)