The sampling errors of maximum likelihood estimates of item-response theory parameters are studied in the case where both people and item parameters are estimated simultaneously. A check on the validity of the standard error formulas is carried out. The effect of varying sample size, test length, and the shape of the ability distribution is…

This report provides information on the background, methodology, and findings of the Videodisc-Microcomputer (ViM) Network project, which brought together over 40 schools in 15 states to explore the potential of a new technology for basic skills instruction. Initiated in 1981 and completed at the end of 1983, the project involved a wide variety of…

Designed as a comprehensive guide to the National Longitudinal Surveys of Labor Market Experience (NLS), this handbook is intended for two major categories of readers. For persons who wish to ascertain whether their research interests can be served by the NLS data, the handbook can provide the detailed description of the objectives of the surveys,…

The statistics in this report are based on data obtained from the October, 1974, Current Population Survey conducted by the Bureau of the Census. Estimates are made of the number of children three to five years old enrolled in preprimary programs and analyzed by selected socioeconomic factors of age, race, type of school, control of school…

In the direct and indirect effects of teacher characteristics on educational production of students over time, this study indicates that teacher characteristics were not critical determinants of student achievement. Characteristics include: experience, educational level, recentness of degree and degree nature, college quality, and other…

Among the variables contributing to the therapeutic relationship between counselor and client, empathy has received much attention in counseling process research. Most of this research has relied on brief segments as a sampling unit; seldom have these segments been compared with entire counseling sessions. Segments of sessions and entire sessions…

Practical information is provided, in a question and answer format, for community college officials who are planning to conduct a community needs assessment. A brief discussion of the usefulness of needs assessment surveys to the college planning process is followed by descriptions of eight steps to be followed in planning and conducting a survey:…

Longitudinal measures of change are the most important kinds of estimates being produced from the National Longitudinal Study of the High School Class of 1972 (NLS). Several topics are presented in this report, most of which build on previous variance components analyses. The major areas covered are effects of stratification and clustering,…

Accurate estimation of variance components used in generalizability theory is essential for the theory to be viewed as an efficacious mechanism for studying the reliability and validity of a measurement procedure. This paper explores two alternatives for dealing with the apparent instability of small sample size used in determining the accuracy of…

Generalizability theory is described and applied to data collection methods for student ratings of instruction. Three generalizability coefficients (generalizing over both students and items, generalizing over students only, and generalizing over items only) are defined, and the appropriateness of each for various purposes is discussed.…

The evaluation design, which prescribes when and from whom to gather data, is described as significant because it can lend credibility to evaluation results. The objectives of this booklet are to aid the evaluator in: choosing a design; putting it into operation; and analyzing and reporting the data. Examples include both formative and summative…

The failure of educational research to fully allow for limitations in methodology when drawing conclusions is faulted. In addition to this, a failure on the part of the media--educational and other--to fully publicize these limitations is also criticized. Methodological shortcomings of the 1977-78 American Institutes of Research (AIR) study of…

It appears that relatively little thought has been given to the methods for reviewing, synthesizing, and reporting the results of a set of empirical studies on a given substantive topic. The question is raised as to whether the studies that have been reviewed constitute a population or a sample, and if a sample, whether they are representative or…

The Reading Is Fundamental (RIF) program is designed to give disadvantaged children incentive to read by letting them choose books from a wide variety of paperbacks and keep them as their own. This document reports on the evaluation procedures and results for the Dallas RIF Project in 1973-1974. Following a description of the project and its…

Selected data from the Commission on Human Resources data base are reported for two major groups that have been underrepresented in doctoral education in the past: minorities and women. A wide selection of tabulations of data on doctorate holders by sex and racial/ethnic group membership is presented. Characteristics of minority and women Ph.D.…