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Peer reviewedDrasgow, Fritz; And Others – Applied Psychological Measurement, 1991
Extensions of unidimensional appropriateness indices are developed for multiunidimensional tests (multidimensional tests composed of unidimensional subtests). Simulated and real data (scores of 2,978 students on the Armed Services Vocational Aptitude Battery) were used to evaluate the indices' effectiveness in determining individuals who are…
Descriptors: Comparative Testing, Computer Simulation, Equations (Mathematics), Graphs
Download full textNandakumar, Ratna – 1992
The performance of the following four methodologies for assessing unidimensionality was examined: (1) DIMTEST; (2) the approach of P. W. Holland and P. R. Rosenbaum; (3) linear factor analysis; and (4) non-linear factor analysis. Each method is examined and compared with other methods using simulated data sets and real data sets. Seven data sets,…
Descriptors: Ability, Comparative Testing, Correlation, Equations (Mathematics)
Peer reviewedDe Ayala, R. J. – Applied Psychological Measurement, 1992
A computerized adaptive test (CAT) based on the nominal response model (NR CAT) was implemented, and the performance of the NR CAT and a CAT based on the three-parameter logistic model was compared. The NR CAT produced trait estimates comparable to those of the three-parameter test. (SLD)
Descriptors: Adaptive Testing, Comparative Testing, Computer Assisted Testing, Equations (Mathematics)
De Ayala, R. J. – 1992
One important and promising application of item response theory (IRT) is computerized adaptive testing (CAT). The implementation of a nominal response model-based CAT (NRCAT) was studied. Item pool characteristics for the NRCAT as well as the comparative performance of the NRCAT and a CAT based on the three-parameter logistic (3PL) model were…
Descriptors: Adaptive Testing, Comparative Testing, Computer Assisted Testing, Computer Simulation
Peer reviewedKim, Seock-Ho; Cohen, Allan S. – Applied Psychological Measurement, 1991
The exact and closed-interval area measures for detecting differential item functioning are compared for actual data from 1,000 African-American and 1,000 white college students taking a vocabulary test with items intentionally constructed to favor 1 set of examinees. No real differences in detection of biased items were found. (SLD)
Descriptors: Black Students, College Students, Comparative Testing, Equations (Mathematics)
Spray, Judith A.; Miller, Timothy R. – 1992
A popular method of analyzing test items for differential item functioning (DIF) is to compute a statistic that conditions samples of examinees from different populations on an estimate of ability. This conditioning or matching by ability is intended to produce an appropriate statistic that is sensitive to true differences in item functioning,…
Descriptors: Blacks, College Entrance Examinations, Comparative Testing, Computer Simulation
Nandakumar, Ratna – 1992
The phenomenon of simultaneous differential item functioning (DIF) amplification and cancellation and the role of the SIBTEST computer program in detecting it were studied. A variety of simulated test data was generated for this purpose. In addition, the following real test data were used: (1) American College Testing program data for 2,115 males…
Descriptors: Black Students, Comparative Testing, Computer Simulation, Computer Software
