A method is presented for determining sample size that will achieve a pre-specified bound on confidence interval width for the interrater agreement measure "kappa." The same results can be used when a pre-specified power is desired for testing hypotheses about the value of kappa. (Author/SLD)

Conceptual rationales from five research contexts are presented, which all posit unmeasured variables that interact with observed independent variables to produce a complete model of the dependent variable. Strategies for overcoming related difficulties are outlined, including increased longitudinal assessment, oversampling of levels of…

This paper provides a framework for developing sampling designs in mixed methods research. First, we present sampling schemes that have been associated with quantitative and qualitative research. Second, we discuss sample size considerations and provide sample size recommendations for each of the major research designs for quantitative and…

Most of the observational study of marriage has focused on relatively young and highly educated couples from professional backgrounds; working-class couples, older couples, and couples from distressed marriages seem reluctant to volunteer for research on close relationships. The development of techniques for recruiting these couples represents an…

After the terms "qualitative research" and "quantitative research" are defined, this paper considers why it makes sense to integrate these approaches, at least under some circumstances. This discussion necessitates attention to the issue of whether quantitative and qualitative research are inextricably linked to incompatible…

Lowenfeld (1945) developed a series of six instruments which could be used to identify perceptual abilities. For this study, the visually oriented person was defined as the objective viewer of the environment, while the haptic person was defined as a person who uses the eyes only when forced to do so and relates to his environment subjectively. He…

This brief guide to interview training in survey research is designed for persons without previous training or experience in interviewing. Basic techniques of interviewing are presented in such a manner as to facilitate the training of persons with varying educational and socioeconomic backgrounds. Topics include: the interviewer's role in the…

Specific limitations of past research in teacher verbal questioning behavior are presented in this article for the purpose of providing recommendations for future research activities. Analyses are made by reviewing related literature. Limitation factors are identified as resulting from variations in the following aspects: teacher characteristics,…

This paper describes a two-stage sampling design for obtaining probability samples of the elderly and other specialized populations. Results indicate elderly individuals will respond, use of the design does not appear to increase sample bias, and the method is extremely inexpensive. (Author)

In this paper, tables for the appropriate sample sizes are presented and discussed in the context that the determination of the effect size must precede the determination of the sample size. (Author/PN)

If the quantitative result of a study is observed only when the mean difference is statistically significant, the observed mean difference, variance, and effect size are biased estimators of corresponding population parameters. The exact distribution of sample effect size and the maximum likelihood estimator of effect size are derived. (Author/BW)

Rosenthan's (1979) concept of fail-safe N has thus far been applied to probability levels exclusively. This note introduces a fail-safe N for effect size. (Author)

Sampling problems related to the use of system-identified subjects in special education research are considered. Differences in criteria and selection of mildly handicapped students have resulted in limited generalizability of findings. Among suggested approaches are using rationally defined subgroups, cluster analysis, and marker variables.…

Tells how staff members of a college newspaper worked out a procedure for obtaining and interviewing a sample of students that accurately represented the entire student body. (GT)