Search results for author:"Louis Roussos"
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Annual Meeting of the American Educational Research Association 1997 (March 1997)
This paper investigates the performance of CATSIB (a modified version of the SIBTEST computer program) to assess differential item functioning (DIF) in the context of computerized adaptive testing (CAT). One of the distinguishing features of CATSIB...
Journal of Educational and Behavioral Statistics Vol. 29, No. 2 (2004) pp. 177–200
A new procedure, CATSIB, for assessing differential item functioning (DIF) on computerized adaptive tests (CATs) is proposed. CATSIB, a modified SIBTEST procedure, matches test takers on estimated ability and controls for impact-induced Type 1 error ...
Journal of Educational Measurement Vol. 46, No. 3 (2009) pp. 273–292
Much recent psychometric literature has focused on cognitive diagnosis models (CDMs), a promising class of instruments used to measure the strengths and weaknesses of examinees. This article introduces a genetic algorithm to perform automated test...
Annual Meeting of the National Council on Measurement in Education (NCME) 2000 (April 2000)
CATSIB is a differential item functioning (DIF) assessment methodology for computerized adaptive test (CAT) data. Kernel smoothing (KS) is a technique for nonparametric estimation of item response functions. In this study an attempt has been made to ...
Journal of Educational Measurement Vol. 46, No. 1 (2009) pp. 84–103
In computerized adaptive testing (CAT), ensuring the security of test items is a crucial practical consideration. A common approach to reducing item theft is to define maximum item exposure rates, i.e., to limit the proportion of examinees to whom a ...