Examines two methods of differentially classifying language-delayed children as either specifically language impaired (SLI) or developmental-lag language impaired. Results indicated significant differences in classification between the two methods of defining SLI, as well as substantial changes in classification over time using either method. (47…

Analyzes structural factors affecting the cross-sectional variation in occupational differentiation between urban Blacks and Whites. Finds that the relative size of the Black population is the most powerful indicator of the level of occupational differentiation, but that educational level and the size of the urban population also had significant…

Tests of 172 fourth grade students in Zaria, Nigeria, supported the hypotheses that non-Western subjects' difficulties in judging depth in linear pictures are a function of individual perceptual organization, and that training could improve field independence and depth perception. Discusses child-rearing practices that may increase field…

Different approaches to defining suppression in multiple regression/correlation are compared, and their differences are illustrated. A test for determining the significance of a suppressor effect, which is based on the definition of suppression of W. F. Velicer, is extended to the general multiple predictor case and analysis of variance. (SLD)

Explores the effects of task characteristics and structural characteristics on aspects of information processing based on a survey of employees in the Australian telecommunications industry. Relevant research is reviewed; the analysis of results is explained; and implications for organizations are suggested. (Contains 42 references.) (LRW)

Analysis of 19 language features in impromptu essays written by 96 students (half males, half females) from grades 4, 8, and 12 enabled researchers to identify the gender of the writer 84-87 percent of the time. Further analyses established a relationship between this "gender-linked language effect" and subjective attributional ratings by…

Analyzed the relative contributions of academic ability, music experience, and musical aptitude to predicting grades in college freshman music theory courses. Found that the best predictor of grades was the mathematics component of the Scholastic Aptitude Test (SAT). Data analysis revealed five factors that accounted for 78.6 percent of the…

Analyzes concentration of employment opportunities for different socioeconomic groups in different local labor-market areas (LMAs). Uses regression analysis of 1980 census data. Finds rural LMAs offer fewer opportunities. Gender differences in occupational concentrations relate to industrial composition of labor market. Racial difference is…

Presents results of a meta-analysis conducted on the literature concerning the effects of feedback on learning from computer-based instruction. Effect size, analysis of variance, multiple regression, and posttest data are described, and the critical role of feedback in computerized instruction is discussed. Contains 50 references. (Author/LRW)

Describes a study investigating the relationship between Hong Kong principals' vision and leadership behavior in 48 secondary schools, half of which participated in a school-based management pilot scheme. Statistically analyzed results suggest that five leadership behavior dimensions were significantly related to principals' vision for both types…

Discusses how to introduce basic concepts of multiple regression by creating a large-scale, three-dimensional regression model using the classroom walls and floor. Addresses teaching points that should be covered and reveals student reaction to the model. Finds that the greatest benefit of the model is the low fear, walk-through, nonmathematical…

The goals of this article are to (a) describe differences between moderator and mediator effects; (b) provide nontechnical descriptions of how to examine each type of effect, including study design, analysis, and interpretation of results; (c) demonstrate how to analyze each type of effect; and (d) provide suggestions for further reading. The…

Earlier research has shown that prior knowledge of psychology is positively associated with course achievement. But are these effects attributable to preexisting differences in general ability or aptitude? The authors administered 2 pretests to 353 students early in an introductory psychology course and obtained measures of general student…

Academic literature regarding state lotteries' impact on education deals primarily with issues of funding, rather than searches for evidence of lotteries directly advancing the cause of higher education, by measuring enrollment numbers before and after the adoption of a state lottery. This study fills this void by researching whether…

In this study, the relationships among students' cognitive/motivational variables, cognitive conflict, and conceptual change were investigated. Subjects were 159 seventh graders in Korea. Tests regarding logical thinking ability, field dependence/independence (FDI), meaningful learning approach, failure tolerance, mastery goal orientation, and…