Scores from the "GRE"® revised General Test provide important information regarding the verbal and quantitative reasoning abilities and analytical writing skills of applicants to graduate programs. The validity and utility of these scores depend upon the degree to which the scores predict success in graduate and business school in…

In this article, I specify a conceptual framework for test validity research on content assessments taken by English language learners (ELLs) in U.S. schools in grades K-12. This framework is modeled after one previously delineated by Willingham et al. (1988), which was developed to guide research on students with disabilities. In this framework…

Discusses the overprediction of minority students' college grades in studies using test scores and high school grades. Describes a study of 790 fourth-year undergraduates, analyzing both academic and nonacademic measures to see if more accurate predictions could be obtained. Reports that the addition of nonacademic constructs resulted in better…

Predictive validity of preadmissions measures may be understated because of correctable defects in freshman year and cumulative high school grade point averages (GPAs). A study used item response theory (IRT) to develop a more reliable measure of performance and test it using Stanford University data. Results showed increased predictability.…

An investigation was conducted to determine whether differential predictive validity, as detected in previous studies, exists for a recent sample of 3,703 college students. Results confirmed that the phenomenon still exists. For women, but not minorities, the difference in predictive validity appears related to course selection. (SLD)

Two statistical approaches for adjusting grades were tested on data obtained from four American law schools (642 students). Neither item response theory nor the general linear model yielded consistent improvements in the predictive validity of Law School Admission Test scores and undergraduate grades for three schools. (SLD)

The development of a valid measure of academic performance through the application of existing statistical methodology in a new manner was studied. Focus was on analyzing the predictive validity of traditional pre-admissions measures in determining overall academic performance in college. This new criterion, termed a Universal Scale for Grades, is…

A new measure of academic performance was developed through a new application of item response theory (IRT). This new criterion, an IRT-based grade point average (GPA), was used to determine the predictive validity of certain preadmissions measures for 1,564 students admitted to Stanford University in 1982. (SLD)

A general linear model (GLM), using least-squares techniques, was used to develop a criterion measure to replace freshman year grade point average (GPA) in college admission predictive validity studies. Problems with the use of GPA include those associated with the combination of grades from different courses and disciplines into a single measure,…

Item response theory (IRT) is used to develop a form of adjusted cumulative grade point average (GPA) for use in predicting college academic performance appropriately for males and females. For 1,564 students at Stanford University (California), the IRT-based GPA was more predictable from preadmission measures than the cumulative GPA. (SLD)

Research in the area of grade adjustment methods from the last 27 years is reviewed in the context of admissions selection and of prediction of student performance in college. Contemporary grade adjustment methods can often produce indexes of academic performance with greater reliability than that found with grade point average. (SLD)

Uses the general linear model to develop an adjusted cumulative grade point average (GPA) that systematically models grading effects among courses. A validation study using 778 courses of 1,564 Stanford (California) University students shows an increase in predictability of the adjusted least-squares GPA over the unadjusted GPA. (SLD)

This research report is a review and analysis of all of the published studies during the past 25+ years (since 1974) in the area of differential validity/prediction and college admission testing. More specifically, this report includes 49 separate studies of differences in validity and/or prediction for different racial/ethnic groups and/or for…