Description Usage Arguments Value References Examples
Generates CUSUM values for Rasch, 2PL and 3PL IRT model based on the Van Krimpen-Stoop & Meijer, (2002).
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dat |
a nxp matrix with n participants and p items. Responses are in 0 1 format. |
ipar |
a pxk matrix with given item parameters p items and k item parameters. ipar[,1] discrimination; ipar[,2] item difficulty; ipar[,3] guessing-parameter. |
abi |
a vector n ability. If not provided, estimated using Expected a Posteriori method. |
IRTmodel |
specify the IRT model ("1PL", "2PL", "3PL"). Default is "2PL" |
Returns matrix with with lower and upper cusum statistics for dat
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Van Krimpen-Stoop, E. M., & Meijer, R. R. (2002). Detection of person misfit in computerized adaptive tests with polytomous items. Applied Psychological Measurement, 26(2), 164-180.
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