Details

Autor(en) / Beteiligte

• Wise, Steven L.
• DeMars, Christine E.

Titel

An Application of Item Response Time: The Effort-Moderated IRT Model

Ist Teil von

• Journal of educational measurement, 2006-03, Vol.43 (1), p.19-38

Ort / Verlag

350 Main St , Malden , MA 02148 , USA , and PO Box 1354, Garsington Rd , Oxford OX4 2DQ , UK , and PO Box 378 Carlton South , 3053 Victoria , Australia: Blackwell Publishing

Erscheinungsjahr

2006

Quelle

Applied Social Sciences Index & Abstracts (ASSIA)

Beschreibungen/Notizen

• The validity of inferences based on achievement test scores is dependent on the amount of effort that examinees put forth while taking the test. With low-stakes tests, for which this problem is particularly prevalent, there is a consequent need for psychometric models that can take into account differing levels of examinee effort. This article introduces the effort-moderated IRT model, which incorporates item response time into proficiency estimation and item parameter estimation. In two studies of the effort-moderated model when rapid guessing (i.e., reflecting low examinee effort) was present, one based on real data and the other on simulated data, the effort-moderated model performed better than the standard 3PL model. Specifically, it was found that the effort-moderated model (a) showed better model fit, (b) yielded more accurate item parameter estimates, (c) more accurately estimated test information, and (d) yielded proficiency estimates with higher convergent validity.