The analysis of variance, Welch, and Brown and Forsyth tests for mean equality were compared using Monte Carlo methods. The tests' rates of Type I error and power were examined when populations were nonnormal, variances were heterogeneous, and group sizes were unequal. Recommendations for use are presented. (Author/JKS)

A maximum likelihood estimation procedure was developed to fit weighted and unweighted additive models of conjoint data obtained by categorical rating, paired comparisons or directional ranking methods. Practical uses of the procedure are presented to demonstrate various advantages of the procedure as a statistical method. (Author/JKS)

Statistical significance is not a sufficient condition for claiming a hypothesis has been supported. Constructive replications are more important. Statistically significant results may be meaningless while a sequence of nonsignificant results may be quite important. Gives advice on how to overcome some limitations of classifical statistical…

Reports results of survey of United States online database producers designed to determine number of personnel employed in intellectual production of databases and provide basis for generation of people employed in frequently recurring staff categories. Implications for education based on needs suggested by staffing patterns are examined.…

This demonstration experiment is suitable for teaching many aspects of statistics. The aim is to do so in a motivating, worthwhile fashion. (MNS)

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)

Examines what power-related changes occured in science education research over the past decade as a result of an earlier survey. Previous recommendations are expanded/expounded upon within the context of more recent work in the area. Proposes guidelines for reporting minimal amount of information for clear/independent evaluation of research…

Educational research would benefit if standards could be agreed for recording precisely what has been done in a research study, and if these records were available for scrutiny. Advantages claimed include better quality data, easier comparison with other studies, the possibility of analysis by others and greater credibility of findings. (BRR)

Most students do not know how to determine the equilibrium constant and estimate the error in it from spectrophotometric data that contain experimental errors. This "dry-lab" experiment describes a method that may be used to determine the "best-fit" value of the 1:1 equilibrium constant to spectrophotometric data. (Author/JN)

Discusses problems encountered in evaluating a mass drug education program including instrument selection, logistical constraints, and data analysis. Offers suggestions as to program evaluation improvement. (Author/RC)

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…

The authors show how to analyze occupational supply/demand conditions in a labor market. They discuss demand analysis and supply analysis, and list their outcomes. (CT)

Content analyzed four personality inventories, Eysenck Personality Questionnaire, Minnesota Multiphasic Personality Inventory, California Personality Inventory, and Edwards Personality Preference Schedule to determine whether each item in the four inventories contained situational, temporal, or comparative information. Wide differences appeared…

The rupture between evaluation and action is seen as a failure to take a systems view of the situation. Both the organization and the proposed evaluation program must be understood as interactive systems, which mesh with, rather than oppose, each other if they are appropriately designed and implemented. (MLW)

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)