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Monitoring Items in Real Time to Enhance CAT Security.
- Source :
-
Journal of Educational Measurement . May2016, Vol. 53 Issue 2, p131-151. 21p. - Publication Year :
- 2016
-
Abstract
- An IRT-based sequential procedure is developed to monitor items for enhancing test security. The procedure uses a series of statistical hypothesis tests to examine whether the statistical characteristics of each item under inspection have changed significantly during CAT administration. This procedure is compared with a previously developed CTT-based procedure through simulation studies. The results show that when the total number of examinees is fixed both procedures can control the rate of type I errors at any reasonable significance level by choosing an appropriate cutoff point and meanwhile maintain a low rate of type II errors. Further, the IRT-based method has a much lower type II error rate or more power than the CTT-based method when the number of compromised items is small (e.g., 5), which can be achieved if the IRT-based procedure can be applied in an active mode in the sense that flagged items can be replaced with new items. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00220655
- Volume :
- 53
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Educational Measurement
- Publication Type :
- Academic Journal
- Accession number :
- 115832455
- Full Text :
- https://doi.org/10.1111/jedm.12104