A procedure was developed to analyze data with missing observations by extracting data from a sparsely filled data matrix into analyzable smaller subsets of data. This subdividing method, based on the conceptual framework of meta-analysis, was accomplished by creating data sets that exhibit structural designs and then pooling variance components…

An evaluation of the variation of item estimates was conducted for the multidimensional extension of the logistic item response theory (MIRT) model. The empirically determined standard errors (SEs) of marginal maximum likelihood estimation (MMLE)/Bayesian item estimates from 40 items from the ACT Assessment (Form 24b, 1985) were obtained when the…

The objective of this study is to summarize Israeli children's information and interpretation of the 1973 Middle East War while the intense fighting was in process. (Author/KM)

Scores on three measures of conceptual complexity were related to a number of biographic and demographic variables. Grade point average and academic major were examined for implications of conceptual complexity for education; religious affiliation and voting preference for connections between levels of conceptual functioning and antecedent…

Data quite clearly indicated that students should be allowed and encouraged to reconsider and evaluate their responses to objective test items. (Author)

Experiments designed to investigate performance on a complex task as it varies with training. (Author)

Evidence supporting two roles of imitation in language acquisition was found in a single child's speech studied at ages 2.8 and 3.0. Imitation can serve to limit the language environment's complexity, and forms may appear in imitations before appearing in spontaneous speech. Use of "what?" is given as an example. (MSE)