This paper describes a study that investigated the communication network efficiency and network efficiency stability of four urban high schools, using a sociometric questionnaire and a computer-developed communication matrix. Working hypothesis for the study was that schools with fewer staff members would have more efficient and more stable…

The fourth in a series of six guidebooks on minimum course content for second-year algebra, this booklet covers linear and quadratic relations, absolute value, graphing complex numbers, determinants and matrices, graphing quadratic relations, and solving systems of linear and quadratic equations. Overall course goals are specified, a course…

This paper concerns situations in which a p x p covariance matrix is a function of an unknown q x 1 parameter vector y-sub-o. Notation is defined in the second section, and some algebraic results used in subsequent sections are given. Section 3 deals with asymptotic properties of generalized least squares (G.L.S.) estimators of y-sub-o. Section 4…

A subject by item matrix of test responses is shown to be a useful heuristic in criterion referenced and norm referenced test analysis, and in the teaching of measurement. The pattern of responses within the matrix provides indications of item interactions, weak deceptors, and conventional test statistics. The strong visual analogy between the…

As part of a symposium on "A Plan for the Comprehensive Evaluation of College Teaching," this paper focuses on the third of three suggested levels of an evaluation matrix, specific feedback data aimed at pinpointing reasons for and solving problems with teaching and classroom activities. Methods of getting specific feedback data from students and…

The optimum weighting of variables to predict a dependent-criterion variable is an important problem in nearly all of the social and natural sciences. Although the predominant method, multiple regression analysis (MR), yields optimum weights for the sample at hand, these weights are not generally optimum in the population from which the sample was…

A method of analysis is developed which accounts for whatever variance is present in the responses to test items, additive, configural or the two combined. The method is applied to successive column matrices which report frequencies or endorsements by categories of subjects to answer alternative sets of test items. Approaches are included which…

In maximum likelihood factor analysis, there arises a situation whereby improper solutions occur. The causes of those improper solution are discussed and illustrated. (JKS)

Organizational facilitation of student development is a significant but difficult process in colleges and universities with traditional priorities on academic concerns. Organizational factors are analyzed and a model is proposed implementing student development through the accommodation of diverse organizational elements and by an integrated…

Since computer programs have been available for estimating and testing linear causal models, these models have been used increasingly in the behavioral sciences. This paper discusses the problem that very different causal structures may fit the same set of data equally well. (Author/LMO)

The problem of controlling the grizzly bear population at Yellowstone is described. The results are presented in graphical form and discussed. A computer program is included. (MNS)

Examines the study of transformations which result from cross-sections of a prism. The study involves some model-making, which in turn introduces some new problems of drawing and construction. The material is presented with the practicalities of classroom teaching in mind. (Author/JN)

The EM algorithm is used to derive maximum likelihood estimates for item parameters of the two-parameter logistic item response curves. The observed information matrix is then used to approximate the covariance matrix of these estimates. Simulated data are used to compare the estimated and actual item parameters. (Author/BW)

The convergent and discriminant validity of common measures of three faculty competence attributes (teaching, research, and service) were investigated using multitrait-multimethod (MTMM) matrix analysis. Three different measures for each component were collected on 57 college professors. Results distinguished the three hypothesized components, but…

Techniques used in contemporary social network analysis are applied to citation data for a network of journals from three time periods--1970/71, 1975/76, 1980/81. Blocks or positions in journal network based on structural equivalence correspond closely to categorization by aims and objectives. Hypotheses concerning journal networks are advanced.…