00515nas a2200133 4500008004100000245009400041210006900135300001200204490000700216100001200223700001400235700001600249856011600265 2010 Eng d00aStratified and maximum information item selection procedures in computer adaptive testing0 aStratified and maximum information item selection procedures in a202-2260 v471 aDeng, H1 aAnsley, T1 aChang, H -H uhttp://iacat.org/content/stratified-and-maximum-information-item-selection-procedures-computer-adaptive-testing01423nas a2200133 4500008003900000245008900039210006900128300001200197490000700209520094400216100001601160700001201176856010101188 2008 d00aTo Weight Or Not To Weight? Balancing Influence Of Initial Items In Adaptive Testing0 aTo Weight Or Not To Weight Balancing Influence Of Initial Items a441-4500 v733 a
It has been widely reported that in computerized adaptive testing some examinees may get much lower scores than they would normally if an alternative paper-and-pencil version were given. The main purpose of this investigation is to quantitatively reveal the cause for the underestimation phenomenon. The logistic models, including the 1PL, 2PL, and 3PL models, are used to demonstrate our assertions. Our analytical derivation shows that, under the maximum information item selection strategy, if an examinee failed a few items at the beginning of the test, easy but more discriminating items are likely to be administered. Such items are ineffective to move the estimate close to the true theta, unless the test is sufficiently long or a variable-length test is used. Our results also indicate that a certain weighting mechanism is necessary to make the algorithm rely less on the items administered at the beginning of the test.
1 aChang, H -H1 aYing, Z uhttp://iacat.org/content/weight-or-not-weight-balancing-influence-initial-items-adaptive-testing00407nas a2200121 4500008003900000245006100039210005900100300001400159490000700173100001000180700001600190856007900206 2003 d00aa-Stratified multistage CAT design with content-blocking0 aaStratified multistage CAT design with contentblocking a359–3780 v561 aYi, Q1 aChang, H -H uhttp://iacat.org/content/stratified-multistage-cat-design-content-blocking00435nas a2200121 4500008004500000245006700045210006500112300001200177490000700189100001600196700001200212856008900224 1996 Engldsh 00aA Global Information Approach to Computerized Adaptive Testing0 aGlobal Information Approach to Computerized Adaptive Testing a213-2290 v201 aChang, H -H1 aYing, Z uhttp://iacat.org/content/global-information-approach-computerized-adaptive-testing-1