A common problem in the behavioral sciences is to determine if a set of observed variables can be more parsimoniously represented by a smaller set of derived variables. To address this problem, the performance of five methods for determining the number of components to retain (Horn's parallel analysis, Velicer's Minimum Average Partial (MAP),…

This study evaluated the effectiveness of an expert instructional system used to provide timely and quality feedback about the quality of a variety of visual materials production techniques to undergraduate students in a basic instructional materials production class. One group of students generated its own feedback by using the expert system, and…

Analysis of current methods for achieving compatibility or convertibility between two or more indexing languages draws attention to the need for a switching language to establish equivalency between concepts, not terms. In order to examine the assumption of the conceptual equivalency of identical terms in the indexing languages of related subject…

Compensatory education for disadvantaged preschool children includes, as one of its central components, a planned intervention program which is to provide the deprived child with linguistic skills comparable to those acquired naturally by children with a middle-class background. The hypothesis guiding the design and implementation of this study…

Describes a citation analysis of physics, engineering, and sociology literature which was designed to determine if there were any differences in conceptual referencing patterns. The research methodology is described and suggestions for further study are offered. (Author/LRW)

This paper investigates three methods for comparing medians rather than means in studying two independent treatment groups. The method that gave the best results is based on a normal approximation of the distribution of the sample median where the variance is estimated using results reported by Maritz and Jarrett. (Author/JAZ)

Describes a study of undergraduates that investigated the effects of communication mode (i.e., face-to-face versus remote), information load, and distribution of information on biased discussion in groups. Topics discussed include computer-mediated communication systems (CMCS); biased discussion and information characteristics; and biased…

Describes an experiment that was designed to compare three different map displays used as a visual display for information retrieval by either a self-organizing algorithm or human subjects. Results indicate that the organization and visual appearance of map displays had a significant effect on subjects' searching and browsing on the map displays.…

Through Monte Carlo simulation, respective normative and intuitive strategies for covariation assessment and Bayesian inference are compared. Results indicate that better performance in both tasks results from considering alternative hypotheses, although not necessarily using a normative strategy. Conditions under which intuitive strategies may be…

How the organization of knowledge influences scientific reasoning was studied as 132 college students completed a selection task with familiar or unfamiliar semantic content and interclause relationships expressing or not expressing entailment. Results support a constructivist view of reasoning emphasizing the importance of organization of…

This study, involving 59 disabled and nondisabled adolescent readers, tested A. Kennedy's "spatial map" hypothesis wherein spatial sequencing ability is important in lexical reaccess under high-demand text situations alone. Tests of the variance contributions of a spatial sequencing covariate to eye movement dependent measures of reading, across…

Discusses a new model of concept learning called prototype theory and describes an experiment with nursing education students in which the differential effects of prototype formation on classification were explored through an instructional program on the concept of shock. Hypotheses tested are discussed and results of pretests and posttests are…

Compares the impact of two different computer-mediated communication (CMC) systems, with different prescribed guidelines for use, on the per-person volume of online interchanges in two graduate classes. Hypothesies a relationship between system characteristics, guidelines for use, and the perpetuation of verbal interaction in settings where CMC is…

Visual perception may be a developmental prerequisite to some types of social understanding. The ability to perceive social information given visual motion appears to develop early. However, children with autism have profound deficits in social cognitive function and may fail to see social motion in the same way that typically developing children…