The present article reviews the procedures that have been developed for measuring the reliability of human observers' judgments when making direct observations of behavior. These include the percentage of agreement, Cohen's Kappa, phi, and univariate and multivariate agreement measures that are based on quasi-equiprobability and quasi-independence…

Issues regarding tolerance and confidence intervals are discussed within the context of educational measurement, and conceptual distinctions are drawn between these two types of intervals. Points are raised about the advantages of tolerance intervals when the focus is on a particular observed score rather than a particular examinee. (Author/BW)

The Galois-lattice is a graphic method for representing all possible developmental phases to reach a given total knowledge via different partial knowledge structures. Algorithms are proposed for incorporating statistical analysis into the Galois-lattice method. A comparison to the Rasch model and application for educational research are given. (BS)

Presents a model for projecting community college enrollments, providing a rationale for and explanation of the use of the following variables: high school seniors in the district; total population in the district between the ages of 20 and 29, and 30 and 39; insured unemployment rate; and capping of enrollment by senior institutions. (DMM)

A latent class model for rating data is presented which provides an alternative to the latent trait approach of analyzing test data. It is the analog of Andrich's binomial Rasch model for Lazarsfeld's latent class analysis (LCA). Response probabilities for rating categories follow a binomial distribution and depend on class-specific item…

Structural equation models require formidable computational techniques. Testing the goodness of fit involves discrepancies between original correlations among variables and correlations estimated by solved path coefficients. A BASIC computer program which solves these problems is presented and discussed. (Author/GDC)

The approach of J. D. Sneed is used to argue for a distinction between theoretical and nontheoretical (or empirical) entities. Attention is directed toward this approach as an important facility for looking at statistics and for constructing a framework for the correct use of statistical theory in information retrieval experiments. (MBR)

Discusses areas in the undergraduate curriculum that are important due to recent technological changes (such as contributing effectively to group projects and the ability to take advantage of continuing education opportunities). Examines possible responses to these areas, focusing on the role of computers and on the mathematics curriculum. (JN)

Describes the use of an instructional module used to introduce college students to a combined mathematical modeling and normative analysis approach to the investigation of public policy issues. The module, which was designed to bridge several courses and combined independent work with discussions, was judged to be successful in promoting…

Computer generated data representative of 16 Auto Regressive Integrated Moving Averages (ARIMA) models were used to compare the results of interrupted time-series analysis using: (1) the known model identification, (2) an assumed (l,0,0) model, and (3) an assumed (3,0,0) model as an approximation to the General Transformation approach. (Author/BW)

Decomposable models, which allow for the interdependence of structure among observable variables, are described. Each model is fully characterized by a set of conditional interdependence restrictions and can be visualized with an undirected as well as a special type of directed graph. (Author/JKS)

Describes a Fortran program that illustrates how the end-to-end distances in randomly coiled polymer molecules is affected by varying the number and lengths of chains and the angles between them. (MLH)

A more generalized error model for time-limit tests is developed. Model estimates are derived for right-attempted and wrong-attempted correlations both within the same test and between different tests. A comparison is made between observed correlations and their model counterparts and a fair agreement is found between observed and expected…

Possibilities of using regression techniques for predicting, evaluating, and controlling the performance of bibliographic search procedures are explored. "Least time" search sequences for bibliographic searching are determined. (Author)

Geometric models are used to study numerical relationships in summation formulas. (DT)