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Kernel Smoothing Approaches to Nonparametric Item Characteristic Curve Estimation.
Peer reviewed Peer reviewed
Ramsay, J. O. – Psychometrika, 1991
Kernel smoothing methods for nonparametric item characteristic curve estimation are reviewed. A simulation with 500 examinees and real data from 3,000 records of the Graduate Record Examination illustrate the rapidity of kernel smoothing. Even when population curves are three-parameter logistic, simulation suggests no loss of efficiency. (SLD)
Descriptors: College Entrance Examinations, Computer Simulation, Efficiency, Equations (Mathematics)
A Nonparametric Approach for Assessing Latent Trait Unidimensionality.
Peer reviewed Peer reviewed
Stout, William – Psychometrika, 1987
A procedure--based on item response theory--for testing the hypothesis of unidimensionality of the latent space is proposed. Use of the procedure is supported by an asymptotic theory and a Monte Carlo simulation study. The procedure tests for unidimensionality in test construction and/or compares two tests. (SLD)
Descriptors: College Entrance Examinations, Computer Simulation, Equations (Mathematics), Hypothesis Testing
A Comparison of Six Methods for Combining Multiple IRT Item Parameter Estimates.
Peer reviewed Peer reviewed
McKinley, Robert L. – Journal of Educational Measurement, 1988
Six procedures for combining sets of item response theory (IRT) item parameter estimates from different samples were evaluated using real and simulated response data. Results support use of covariance matrix-weighted averaging and a procedure using sample-size-weighted averaging of estimated item characteristic curves at the center of the ability…
Descriptors: College Entrance Examinations, Comparative Analysis, Computer Simulation, Estimation (Mathematics)
Case Studies in Computer Adaptive Test Design through Simulation.
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Eignor, Daniel R.; And Others – 1993
The extensive computer simulation work done in developing the computer adaptive versions of the Graduate Record Examinations (GRE) Board General Test and the College Board Admissions Testing Program (ATP) Scholastic Aptitude Test (SAT) is described in this report. Both the GRE General and SAT computer adaptive tests (CATs), which are fixed length…
Descriptors: Adaptive Testing, Algorithms, Case Studies, College Entrance Examinations
Combining Multiple-Choice and Constructed-Response Test Scores: An Economist's View.
Peer reviewed Peer reviewed
Kennedy, Peter; Walstad, William B. – Applied Measurement in Education, 1997
The consequences in terms of misclassifications of students that would occur by replacing the constructed-response portion of the Advanced Placement (AP) examinations in economics with more multiple-choice items were studied. The 1991 AP examinations in micro- and macroeconomics were used. Computer simulation found that a small but statistically…
Descriptors: Classification, College Entrance Examinations, Computer Simulation, Constructed Response
Performance of the Mantel-Haenszel Statistic and the Standardized Difference in Proportions Correct When Population Ability Distributions Are Incongruent.
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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