If the factor loadings of a core set of variables (fitting the general factor model) are the same when analyzed alone, and when analyzed along with the rest of the variables in an infinite behavior domain, there is only one factor variable in the domain that is a possible factor variable of the core set. If the condition of consistency of factor…

Graphic statistics as developed by John Tukey have some practical benefits for precision journalists as they assist in spotting trends not as easily noted without the use of nonparametric statistics. Some especially helpful graphic statistics are: "stem-and-leaf display,""box plots,""froots," and "flogs."…

A study was made of nine covariates as to their discriminating power between preschoolers who watch Sesame Street regularly and preschoolers who do not watch Sesame Street, Surveyed were 372 3-4 year old children on 9 variables. The nine variables were: race, socioeconomic status, number of siblings, child's birth order, maternal age, maternal…

Approximately 2,000 titles of journals and other periodicals which have published articles in the language sciences have been collected and examined. A determination has been made of the extent of their relevance to the language sciences. In addition, behavioral data identifying journals selected by linguists as those of greatest current interest…

In order to determine the number of credit hours being produced in various subject fields, questionnaires were sent to the institutions of higher education in the state of Colorado. This report presents tabular data on all resident classes taught at publicly controlled institutions, and on some taught at privately controlled institutions. The data…

As a first step in "improving and building up" the graduate program at the Wisconsin State University at Stevens Point, a study of graduate students was initiated in 1967. It examined the interrelationships of their graduate majors, undergraduate majors and colleges, high school deciles and class size, age, sex, level taught, geographic…

Researchers are often in a dilemma as to whether parametric or nonparametric procedures should be cited when assumptions of the parametric methods are thought to be violated. Therefore, the Kruskal-Wallis test and the ANOVA F-test were empirically compared in terms of probability of a Type I error and power under various patterns of mean…

Fixed-width confidence intervals for a population regression line over a finite interval of x have recently been derived by Gafarian. The method is extended to provide fixed-width confidence intervals for the difference between two population regression lines, resulting in a simple procedure analogous to the Johnson-Neyman technique. (Author)

The Rasch model and other latent trait models encounter some difficulty when faced with an appreciable amount of missing data or omitting behavior. The present note assumes that some reasonable missing data model has been formulated which does not involve the parameters associated with the latent ability of interest. A maximum likelihood function…

Information was collected from the files of 6,854 individuals registered with the Special Care Service in Northern Ireland in order to estimate the prevalence rate of mental subnormality in that country. (BD)

Age at first birth is strongly and negatively associated with educational achievement. In addition, there is no evidence that early childbearers catch up with their childless age peers. However, whites seem to incur a greater educational decrement than blacks. (Author/GC)

This article evaluated criticisms by Stevens and Aleamoni (1986) of an article by Gardner and Erdle (1984) on aggregation using either raw or standard scores. It was demonstrated that their criticisms were unfounded. (Author)

The development of a nonparametric K-sample test for equality of slopes using Puri's generalized L statistic is presented. The test is recommended when the assumptions underlying the parametric model are violated. This procedure replaces original data with either ranks (for data with heavy tails) or normal scores (for data with light tails).…

The runs test for random sequences of responding is proposed for application in long inventories with dichotomous items as an index of sterotyped responding. This index is useful for detecting whether the client shifts between response alternatives more or less frequently than would be expected by chance. (LMO)

Three methods of transforming unordered categorical response variables are described: (1) analysis using dummy variables; (2) eigenanalysis of frequency patterns scaled relative to within-groups variance; (3) categorical variables analyzed separately with scale values generated so that the grouping variable and the categorical variable are…