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50 Years of ERIC
50 Years of ERIC
The Education Resources Information Center (ERIC) is celebrating its 50th Birthday! First opened on May 15th, 1964 ERIC continues the long tradition of ongoing innovation and enhancement.

Learn more about the history of ERIC here. PDF icon

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Recent Developments in the Factor Analysis of Categorical Variables.
Mislevy, Robert J. – Journal of Education Statistics, 1986
Recent work in factor analysis of categorical variables is reviewed, emphasizing a generalized least squares solution and a maximum likelihood approach. A common factor model for dichotomous items is introduced, and the estimation of factor loadings from matrices of tetracorrelations is discussed. (LMO)
Descriptors: Bayesian Statistics, Estimation (Mathematics), Factor Analysis, Goodness of Fit
Bayesian Full Rank Marginalization for Two-Way Contingency Tables.
Leonard, Tom; Novick, Melvin R. – Journal of Education Statistics, 1986
A general approach is proposed for modeling the structure of a r x s contingency table and for drawing marginal inferences about all parameters (e.g., interaction effects) in the model. The main approach is relevant whenever rs minus r minus s plus 1 is greater than or equal to 5. Military aptitude test data is used as illustration. (Author/LMO)
Descriptors: Aptitude Tests, Bayesian Statistics, Goodness of Fit, Interaction
Random Coefficient Models for Multilevel Analysis.
de Leeuw, Jan; Kreft, Ita – Journal of Education Statistics, 1986
A statistical model is proposed for both contextual analysis and slopes as outcomes analysis. A random coefficient model is investigated in detail. Various estimation models are reviewed and applied to a Dutch school-career example. (Author/LMO)
Descriptors: Elementary Education, Estimation (Mathematics), Least Squares Statistics, Mathematical Models