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JPLEX: Java Simplex Implementation with Branch-and-Bound Search for Automated Test Assembly
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Park, Ryoungsun; Kim, Jiseon; Dodd, Barbara G.; Chung, Hyewon – Applied Psychological Measurement, 2011
JPLEX, short for Java simPLEX, is an automated test assembly (ATA) program. It is a mixed integer linear programming (MILP) solver written in Java. It reads in a configuration file, solves the minimization problem, and produces an output file for postprocessing. It implements the simplex algorithm to create a fully relaxed solution and…
Descriptors: Test Construction, Automation, Computer Software
Assembling Tests for the Measurement of Multiple Traits.
Peer reviewed Peer reviewed
van der Linden, Wim J. – Applied Psychological Measurement, 1996
For measurement of multiple traits, this paper proposes assembling tests based on the targets for the variance functions of the estimators of each of the traits. A linear programming model is presented to computerize the assembly process. An example of test assembly from a two-dimensional item pool is provided. (SLD)
Descriptors: Computer Software, Estimation (Mathematics), Item Banks, Measurement Techniques
Assessing Essential Unidimensionality of Real Data.
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Nandakumar, Ratna – Applied Psychological Measurement, 1993
The capability of the DIMTEST statistical test in assessing essential unidimensionality of item responses to real tests was investigated for 22 real tests of at least 25 items and 700 or more examinees. DIMTEST results on real tests were able to discriminate between essentially unidimensional and multidimensional tests. (SLD)
Descriptors: Computer Software, Mathematical Models, Measurement Techniques, Test Construction