Mathematical models of library operations are presented which describe the amount of use made of resources by a user in a visit, the distribution of book circulation in a collection, the dependence of circulation on time, and the effect of multiple copies on user satisfaction. (9 references) (Author/NH)

Some proposals on how children may learn the basic multiplication facts through practical activities based on the rectangle. (MM)

This is a response to Shockley (1971) which summarizes the original Light and Smith work; outlines Shockley's criticisms; responds to the statistical issues; and concludes with the methodological implications of the disagreement. (VW)

Johnson-Neyman, Potthoff, and Erlander and Gustavsson techniques for obtaining confidence regions for the difference between regression surfaces are compared. (DG)

Essays written by 14-year-old pupils about a chemistry topic were analyzed for structure and process using ideal paradigms defined mathematically. The students' actual behaviors were then compared with the behavior expected had they used either a serial or a parallel processing strategy based on either a constructive or a reproductive memory.…

The factorial invariance of a temperament questionnaire was studied using the data provided by 24 teachers of 564 kindergarten through fourth-grade children. A LISREL analysis supported the hypothesized three-factor model and established factorial invariance of the shortened version of a behavioral rating scale constructed by Thomas and Chess.…

Presents decision-theoretic models which intrinsically include retrieval of multiple documents whereby system responds to request by presenting documents to patron in sequence, gathering feedback, and using information to modify future retrievals. Document independence model, set retrieval model, sequential retrieval model, learning model,…

The results of reanalyses of statistical procedures used in the class-size meta-analyses by Glass and Smith are reported. The analyses suggest that the use of suboptimal statistical methods did not greatly affect the results of the meta-analyses by Glass and Smith. (Author/PN)

The multitrait multimethod model of test validation is a conceptual approach for collecting, organizing, and integrating this information in making classification and intervention decisions for handicapped children. Typical problems with assessment practice are discussed with suggestions for overcoming these difficulties using the…

Data Envelopment Analysis (DEA), a mathematical model for measuring decision-making units' efficiency, was applied to resource allocation information in the division of occupational and technical programs at San Antonio (Texas) College. Input-output data were used to analyze existing programs' efficiency and proposed program modifications. (RW)

Brief discussion of state-of-the-art of modeling complex information systems distinguishes between macrolevel and microlevel modeling of such systems. Network layout and hierarchical system models, simulation, information acquisition and dissemination, databases and information storage, and operating systems are described and assessed. Thirty-four…

Three item selection methods for criterion-referenced tests are examined: the classical theory of item difficulty and item-test correlation; the latent trait theory of item characteristic curves; and a decision-theoretic approach for optimal item selection. Item contribution to the standardized expected utility of mastery testing is discussed. (CM)

Practical formulas for several analysis of variance (ANOVA) designs and models are presented which make it possible for readers to compute strength of association measures without the use of complete ANOVA tables. (Author/PN)