This research examined the issue of nonresponse bias and how it was reported in nonexperimental quantitative research published in the "Delta Pi Epsilon Journal" between 1995 and 2004. Through content analysis, 85 articles consisting of 91 separate samples were examined. In 72.5% of the cases, possible nonresponse bias was not examined in the…

Family rituals provide a rich context in which to study the relation between ideology and action. Guided by the gender perspective, this article analyzes the experiences of 21 newly married heterosexual couples who described how they planned their weddings. The interplay among gender ideology, gender display, and gender assessment differed across…

Studies of group differences in intelligence often invite conclusions about groups in general from studies of group differences in selected populations. The same design is used in the study of group differences in other traits as well. Investigators observe samples from two groups (e.g. men and women) in some accessible population, but seek to…

Sudden cardiac death among athletes continues to take the lives of college students across the nation. Leadership at all levels of higher education has great concern over this phenomenon. However, the processes and procedures related to hypertrophic cardiomyopathy (HCM) remain poorly understood. Corrado (1998) suggests that sudden cardiac death of…

Two teachers comment in separate articles on the nature of research and on their views of a paper considering scientific validity. (RK)

The purpose of this paper is to point out the importance of sampling considerations and to illustrate the kinds of effect which can be caused by difficulties in sampling by examining three different reports of research. (Author/RK)

Grouping is a statistical procedure through which members of the same group are considered as a single unit of observation. There are methodological and inferential problems associated with various grouping procedures in various settings. This extensive paper focuses on making inferences about individuals when the analysis uses data that is…

The problem of selecting the size of the tails from a sample drawn from a distribution of test scores for item analysis study is discussed. (Author)

Randomization should be employed whenever possible but the use of carefully controlled nonrandomized data to estimate causal effects is a reasonable and necessary procedure in many cases. (Author/BJG)

When a correlation is taken in a sample in which the range of the variables being correlated is limited, it is often desired to apply the correlation to groups with different ranges for the variables. In such situations, a correction for restriction of range (more precisely, restriction of standard deviation) may be necessary. Considered in this…

Aromatic solvents possess the strongest solvency of the hydrogen types, but various air pollution control districts have established maximum limits on the amount that may be present in organic coatings. In the proposed procedure, high efficiency liquid chromatography is used to determine total aromatics in enamels and lacquer thinners, their…

Vapors of trichloroethylene, toluene, methyl ethyl ketone, and butyl cellosolve in air were collected using Scotchpac and Tedlar bags, glass prescription bottles, and charcoal adsorption tubes. Efficiencies of collection are reported. (Author/RH)