Author Details

Schaap, Pieter, University of Pretoria

  • Vol 27, No 2 (2001) - Original Research
    Determining differential item functioning and its effect on the test scores of selected pib indexes, using item response theory techniques
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  • Vol 37, No 1 (2011) - Original Research
    The differential item functioning and structural equivalence of a nonverbal cognitive ability test for five language groups
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