01496nas a2200157 4500008003900000022001400039245006400053210006400117300001400181490000700195520101300202100002401215700002001239700002401259856005501283 2012 d a1745-398400aDetecting Local Item Dependence in Polytomous Adaptive Data0 aDetecting Local Item Dependence in Polytomous Adaptive Data a127–1470 v493 a
A rapidly expanding arena for item response theory (IRT) is in attitudinal and health-outcomes survey applications, often with polytomous items. In particular, there is interest in computer adaptive testing (CAT). Meeting model assumptions is necessary to realize the benefits of IRT in this setting, however. Although initial investigations of local item dependence have been studied both for polytomous items in fixed-form settings and for dichotomous items in CAT settings, there have been no publications applying local item dependence detection methodology to polytomous items in CAT despite its central importance to these applications. The current research uses a simulation study to investigate the extension of widely used pairwise statistics, Yen's Q3 Statistic and Pearson's Statistic X2, in this context. The simulation design and results are contextualized throughout with a real item bank of this type from the Patient-Reported Outcomes Measurement Information System (PROMIS).
1 aMislevy, Jessica, L1 aRupp, André, A1 aHarring, Jeffrey, R uhttp://dx.doi.org/10.1111/j.1745-3984.2012.00165.x