Reviews the criticisms of sampling assumptions in generalizability theory (and in reliability theory) and examines the feasibility of using representative sampling, stratification, homogeneity assumptions, and replications to address these criticisms. Suggests some general outlines for the conduct of generalizability theory studies. (SLD)

Compares costs and effectiveness of five organizational sampling frames (direct enumeration, unemployment insurance (UI) forms, Dun and Bradstreet's Market Identifier (DMI) files, telephone directory white pages, and chamber of commerce membership directories) at identifying a population of business organizations in Durham County, North Carolina.…

Use of the bootstrap method to approximate the sampling variation of eigenvalues is explicated, and its usefulness is amplified by an illustration in conjunction with two commonly used factor criteria. These criteria are eigenvalues larger than one and the Scree test. (TJH)

The Statistical Analysis System (SAS) has been used to program power calculations for the independent samples Hotellings T squared. Three programs have been prepared to accommodate variations in the information that may be available to do the power analysis. (Author/SLD)

Developed a sample-based nonanalytical degrees-of-freedom correction factor for situations sampling both subjects and conditions with measurement data departing from essentially parallel form. Assessed the application of this correction factor through a simulation study involving data sets with a range of design characteristics and manifesting…

Investigated how dissimilar in composition and variability samples inducting reliability coefficients from prior studies were from the cited prior samples from which coefficients were generalized. Results from 20 articles show that citing reliability coefficients from prior studies as the basis for concluding new scores are reliable is only…

The population discrepancy between Cronbach's Coefficient Alpha (L. Cronbach, 1951) and scale reliability with fixed congeneric measure, uncorrelated errors, and sampling of subjects was studied. The difference is expressed in terms of the individual component violations of the assumption of equal tau-equivalence that is necessary and sufficient…

Examined the sampling distributions of equating coefficients produced by the characteristic curve method for tests using graded and nominal response scoring using simulated data. For both models and across all three equating situations, the sampling distributions were generally bell-shaped and peaked, and occasionally had a small degree of…

Most studies on occupational stress concentrate on chronic conditions, whereas research on stressful situations is rather sparse. Using an event-sampling approach, 80 young workers reported stressful events over 7 days (409 work-related and 127 private events). Content analysis showed the newcomers' work experiences to be similar to what is…

This longitudinal study analyzes the time budget and the quality of experience reported by new parents. Five primiparous couples were repeatedly administered Experience Sampling Method. They carried pagers sending random signals 6-8 times a day; at the signal reception, they filled out forms sampling current thoughts, activities, and the quality…

Over the past two decades, several two-tier multiple-choice diagnostic tests in science at a variety grade levels have been reported in the extant literature from several countries. This review summarises these studies, provides an overview of the methodology for their construction, presents two examples of typical items, and lists studies…

Superintendents and school boards should get the most accurate information they can when making policy decisions--and that means data, not anecdotes and impressions. This article discusses factors to consider in conducting a survey. A good survey starts with the basics: Ask the right questions of a good sampling of the defined population; take…

Purpose: The purpose of this article is to discuss the benefits and limitations of, and considerations in, developing a typology of assisted living (AL). Design and Methods: We conducted a review and comparison of nine AL typologies drawn from the literature. Results: Typologies addressed matters related to the structure, process, population, and…

Avoiding statistical mistakes is important for educators at all levels. Basic concepts will help you to avoid making mistakes using statistics and to look at data with a critical eye. Statistical data is used at educational institutions for many purposes. It can be used to support budget requests, changes in educational philosophy, changes to…

Despite the methodological advantages of representative sampling, few researchers in the field of marital violence have employed random samples for laboratory assessments of couples. The current study tests the feasibility and sampling success of three recruitment methods: (a) random digit dialing, (b) directory-assisted recruitment, and (c) a…