Abstract
Traditional methods for item selection in computerized adaptive testing only focus on item information without taking into consideration the time required to answer an item. As a result, some examinees may receive a set of items that take a very long time to finish, and information is not accrued as efficiently as possible. The authors propose two item-selection criteria that utilize information from a lognormal model for response times. The first modifies the maximum information criterion to maximize information per time unit. The second is an inverse time-weighted version of a-stratification that takes advantage of the response time model, but achieves more balanced item exposure than the information-based techniques. Simulations are conducted to compare these procedures against their counterparts that ignore response times, and efficiency of estimation, time-required, and item exposure rates are assessed.
Original language | English (US) |
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Pages (from-to) | 655-670 |
Number of pages | 16 |
Journal | Journal of Educational and Behavioral Statistics |
Volume | 37 |
Issue number | 5 |
DOIs | |
State | Published - Oct 2012 |
Keywords
- computerized adaptive testing
- item exposure control
- lognormal model
- maximum item selection per time unit
- response times
ASJC Scopus subject areas
- Education
- Social Sciences (miscellaneous)