Incidence sampling is a parsimonious method whereby a large number of examinees can be measured on many variables (such as test items) to assess group characteristics. Parameters used to describe an incidence sample are estimated using the theory of generalized symmetric means and generalizability theory. (Author/JKS)

Analysis of 230 major articles in the "Journal of Medical Education" shows 91 percent of those reporting medical education research had less than a 50-50 chance of detecting a small treatment effect. Similar low statistical power was found in other disciplines. Guidelines for reporting research are provided. (MSE)

Second in a three-part series, this article provides suggestions for the development of theoretical models in which issues and questions in economic education can be conceptualized and formally stated as empirically testable hypotheses. (Author/RM)

According to the stage-learning hypothesis, children's ability to learn is constrained by their pretraining stages of cognitive development. Some procedures for obtaining unconfounded tests of this hypothesis are developed in this paper, and some applications to factorial experiments are considered. (Author/BW)

Basic characteristics of survey as a research study are discussed. Issues associated with survey research, potential uses of survey research as a strategy in science education, and potential problems jeopardizing survey studies are also discussed. (JN)

When the precise basis of selection effect on correlation and regression equations is unknown but can be modeled by selection on a variable that is highly but not perfectly related to observed scores, the selection effects can lead to the commonly observed "overprediction" results in studies of predictive bias. (Author/PN)

Methodological adequacy in naturalistic inquiry is enhanced by understanding the differences between the naturalistic and rationalistic paradigms; by using simultaneous data collection and analysis, with prolonged field research, an audit trail, multiple sources, and referential materials; and by employing "thick description" extensively…

Using Project Synthesis as an example of qualitative synthesis research in science education, discusses the characteristics of such research: using research teams to provide perspectives and viewpoints; using variety of data sources; including a conceptual scheme for accomplishing synthesis; and concluding with, among others, an analysis of…

Summarizes research which identified characteristics of evaluation planning, implementation, and follow-up that enhance the likelihood that the resulting information will be utilized. Delineates the exemplary practices employed in North Central Association's planning, implementation, and follow-up procedures. (CAM)

The design and conduct of a national evaluation study is discussed, demonstrating that a control group may not provide the no-cause baseline information expected. Resolution of this problem requires reexamination of paradigms, research practices, and policies, as well as the underlying real world constraints and views that generate them. (PN)

Until experimenters can achieve some measure of control over access to information associated with their writing stimuli and outcome measures, research in composition will have a difficult time providing meaningful information on the unique effects on writing of such things as training programs, ethnicity, previous education, and sex. (HOD)

The failure to appreciate the nature of adult development and its relationship to learning and teaching is in part theoretical and in part due to weak research methodology. New and more effective methodologies use a combination of cross-sections of groups and longitudinal studies. Consideration of adult learner self-concept is also vital. (MSE)

This chapter helps the general reader to understand the test equating issues associated with test disclosure. It also helps the testing practitioner to recognize situations in which equating is necessary, and to understand how to accomplish various kinds of equating. (Author/BW)

Shows how evaluation design and federal involvement in Youth Employment Demonstration Projects unintentionally cause a negative appraisal. Indicates the problem stems from interaction of the contract research corporation, the educational research establishment, and the federal bureaucracy, rather than a specific methodology or bureaucratic…

An introductory educational research course should be comprehensive so as to meet the needs of many students and be a self-contained unit. This course outline follows the sequence of activities involved in an actual research study. Some course topics are debatable because evaluation, research, and statistics overlap considerably. (CP)