The Diablo Valley College (California) Research Office assessed the variation of grades in multiple-section courses and its impact on the ability to predict student success. All classes selected for the study were general education offerings applicable for the Associate of Arts degree and/or transfer, and were taught by more than one instructor. A…

By employing a concomitant variable, researchers can reduce the error, increase the precision, and maximize the power of an experimental design. Blocking and analysis of covariance (ANCOVA) are most often used to harness the power of a concomitant variable. Whether to block or covary and how many blocks to be used if a block design is chosen…

An important issue in educational and employment settings is the degree to which evidence of validity obtained in one situation can be generalized to another situation without further study of validity in the new situation. Theory, procedures, and applications concerning validity generalization are addressed. Meta-analytic techniques make possible…

A correlational analysis was performed to examine the relationship between recognition and recall test formats. A total of 236 college students completed one of four 80-item general knowledge tests; the forms contained 20 items of each of four formats: (1) true; (2) false; (3) multiple-choice; and (4) free response. Ninety-three of the subjects…

Selected methods for evaluating the stability of research results empirically are described, especially with regard to multivariate analysis. It is critically important to evaluate the influences of sampling error on obtained results; statistical significance testing does not inform judgment regarding the probable replicability or the sampling…

The relationship between selected subtests from the Armed Services Vocational Aptitude Battery (ASVAB) and corresponding subtests administered as computerized adaptive tests (CAT) was investigated using a sample of Marine recruits. Results showed that the CAT subtest scores correlated as well with initial ASVAB scores as did ASVAB retest scores,…

This paper contrasts the positions of Kane and Staiger (2002) and Linn and Haug (2002) with that of Rogosa (2002, 2003a) on the volatility in test scores as measures of school growth. In particular, these researchers disagree on whether school growth can be measured reliably in school accountability systems. The different positions of these…

One of the important underlying assumptions of all item response theory (IRT) models is that of local independence. This assumption requires that the response to an item on a test not be influenced by the response to any other items. This assumption is often taken for granted, with little or no scrutiny of the response process required to answer…

This study evaluated whether slight decrements in hearing sensitivity are associated with other communicative deficits. Data from the 38,497 students included in the National Speech and Hearing Survey (NSHS) were used to partition students into three categories of hearing sensitivity, and the prevalence of other communicative problems was computed…

This study used the Learning Style Inventory by Dunn, Dunn, and Price to identify learning style variables among school students in isolated Northeastern Manitoba communities. The importance of these learning styles to educational practice is discussed. The study sample consisted of Cree-speaking students enrolled in grades 4 through 10 at 3…

The Bootstrap method, a computer-intensive statistical method of estimation, is illustrated using a simple and efficient Statistical Analysis System (SAS) routine. The utility of the method for generating unknown parameters, including standard errors for simple statistics, regression coefficients, discriminant function coefficients, and factor…

This study of 145 middle class first grade students investigated whether a relationship exists between early acquisition of Piagetian conservation tasks and gifted performance on a mental abilities test. Students were evaluated individually on tasks involving the conservation of number, of liquid quantity, and of mass. A moderate correlation was…

A study was conducted to establish the construct validity of measures designed to assess topical knowledge. Thirty-one ninth-grade students and 44 third/fourth-grade students were interviewed to ascertain their knowledge about 4 topics; 2 weeks later they responded to 3 tests of topical knowledge. Results were analyzed quantitatively and…

A sample of 467 college freshmen attending a comprehensive, medium size, public institution on the mid-Atlantic coast was studied to examine the relationship between the development of identity and the development of cognition in traditional college freshmen. The sample was predominantly white (88.3%) and of the total number, 51 percent were male…