The data collected for this report can be divided into three segments: a 14-year collection, 1950-51 through 1963-64, on which analyses were performed and the original predictions generated; a six-year follow-up stage, beginning in 1964-65; a twenty-year collection, 1950-51 through 1969-70, from which new predictions were generated; and a…

To predict the educational quality of programs in 150 school districts, this study used 34 predictor variables in a multiple regression analysis. Dependent variables used to represent educational quality in a district were (1) the percent of rejections by the local Selective Service Boards for mental reasons, (2) the percent of elementary and…

This second part of a final report delineating policy issues and analytical problems in evaluating vocational education, includes three extensive appendixes and a wide range of tables. The appendixes include: (1) the methodology of cost-effectiveness analysis and a critique of the methodology of major studies, with illustrations; (2) selected…

The overall hypothesis tested in this study supported a significant relationship between the local school superintendent's attitude toward federal aid to education profiles and selected factors in his experience and background. This overall hypothesis was expanded to 11 hypotheses for purposes of the study. An inventory of 114 statements about…

Extending the classical twin method, Arthur R. Jensen claims to find unique estimates of the variance and covariance of the genetic and environmental components of IQ. The analyses presented in this paper show that a wide variety of parameter estimates are compatible with his model and data. But the extent of indeterminancy is deemed to be even…

This study bears on Arthur R. Jensen's latest statement on the heritability of intelligence. Allowing for gene-environment correlation, Jensen (1975) reports that under a wide range of assumptions, the twin data show that one-half to three-fourths of IQ variance is accounted for by genetic factors. This conclusion falls when an arbitrary…

This report presents a statistical portrait of the changing role of women in the United States during the 20th century. Data are from United States Government sources--from surveys, decennial censuses, vital statistics, and administrative records. The majority of the statistics have been published previously, either in government documents or…

Describes a study which examines the relationship between a rise in juvenile crime and the school term. Concludes that adolescents act out in the community the roles they acquire in schools. Journal available from Joan Watson, Distribution Secretary, The New Era, 54 Fontarabia Road, London, SWII 5PF. (KC)

Six models for evaluating change are examined via a Monte Carlo study. All six models show a lack of power. A modified analysis of variance procedure is suggested as an alternative. (JKS)

In this paper a Bayesian procedure is developed for the simultaneous estimation of the reading ability and difficulty parameters which are assumed to be factors in reading errors by the multiplicative Poisson Model. According to several criteria, the Bayesian estimates are better than comparable maximum likelihood estimates. (Author/JAZ)

Two easily computed test statistics are proposed for testing the equality of two correlated proportions when some observations are missing on both responses. The performance of these tests in terms of size and power is compared with other tests by means of Monte Carlo simulations. (Author/BS)

Standard maximum likeliheed estimation was compared using two forms of robust estimation, BIWEIGHT (based on Tukey's Biweight) and AMTJACK (AMT-Robustified Jackknife), and Rasch model person analysis. The two procedures recovered the generating parameters, but Rasch person analysis also helped to identify the nature of a response disturbance. (GDC)

Advantages and disadvantages of joint maximum likelihood, marginal maximum likelihood, and Bayesian methods of parameter estimation in item response theory are discussed and compared. (Author)

The consistency of student response patterns on a test of language arts was examined in a set of studies as a first step toward designing a computer adaptive test to diagnose errors. (Author/LMO)

This Monte Carlo study examined the validity of the chi-square test for model evaluation in different instances of misspecification and sample size. The usefulness of the chi-square difference statistic to compare competing structures and improvement in fit is also addressed. (Author/BS)