Discusses the redesign of educational systems and presents a designing matrix to help select boundaries of a new system. A conceptual framework for exploring educational system boundaries is described, systems models are discussed, and the three cells of the matrix are explained. (LRW)

In confirmatory factor analysis (CFA), models exist that are admissible and demonstrably identified where the factor loading matrix from latent to manifest variables is of less than full column rank, even though other models are not identified. Implications for CFA are discussed. (SLD)

Introduces a schema for classifying research in mathematics education that deepens and extends the Romberg/Bourne Model. Employs dual hierarchical systems, one related to the research task and the other to research technique. (Author/CCM)

Developed a structural analysis of 3 spatial diagrams (matrices, networks, and hierarchies) that specifies 10 properties on which these diagrammatic representations are hypothesized to differ. Coded verbal protocols of 23 college students about these representations. Results suggest that the organization of students knowledge is consistent with…

Multivariate models are demonstrated to analyze repeated measures profile and growth curve data when univariate or multivariate mixed model assumptions are not tenable. Standard mixed model tests are recovered from certain multivariate hypotheses. The procedures are illustrated using numerical examples. (Author/RC)

The study of confusion data is a well established practice in psychology. Although many types of analytical approaches for confusion data are available, among the most common methods are the extraction of 1 or more subsets of stimuli, the partitioning of the complete stimulus set into distinct groups, and the ordering of the stimulus set. Although…

A study comparing citations received by patents in given year to number received in subsequent years found that, even though influential patents remain influential, both highly and infrequently cited patents age at same rate. Distribution of patents by number of citations received is stable over time. (17 references) (EJS)

Describes a staffing matrix that provides a concise summary making it possible to compare race and sex groups on any staffing action. (Author/IRT)

A creatology matrix is developed to examine the abilities, processes, and products of four kinds of entities (culture, organization, group, person). Also examined are creativity as a matter of knowledge, identification with basic cultural values, and typicality of creative people within a culture. (JDD)

Presents new methods for compressing bit matrices in large information retrieval systems which exploit possible correlations between rows of words and columns of documents. Three encoding methods are tested and compared--Shannon-Fano, arithmetic, and Huffman--and an appendix discusses binomial coefficients. (20 references) (LRW)

Generalizing Boolean matrix decomposition to a larger class of matrix decomposition models is demonstrated, and probability matrix decomposition (PMD) models are introduced as a probabilistic version of the larger class. An algorithm is presented for the computation of maximum likelihood and maximum a posteriori estimates of the parameters of PMD…

When constructed response test items are scored by more than one rater, the repeated ratings allow for the consideration of individual rater bias and variability in estimating student proficiency. Several hierarchical models based on item response theory have been introduced to model such effects. In this article, the authors demonstrate how these…

The Curriculum Matrix developed by A. W. Foshay (1991) is a broad, comprehensive conception of curriculum, incorporating a range of perspectives and meanings often overlooked. This paper situates Foshay's matrix in the field of curriculum studies. By focusing on Foshay's interpretation of five curricular purposes (aesthetic, physical,…

Institutional modeling and program evaluation in relation to a correspondence program are discussed. The evaluation process is first considered from the viewpoint that it is an add-on activity, which is largely summative, and is the least desirable type of evaluation. Formative evaluation is next considered as a part of the process of institution…