Search results for author:"Ratna Nandakumar"
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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 ...
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...
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 ...