Item-Weighted Likelihood Method for Ability Estimation in Tests Composed of Both Dichotomous and Polytomous Items

作者：Tao, Jian^*; Shi, Ning Zhong; Chang, Hua Hua

来源：Journal of Educational and Behavioral Statistics, 2012, 37(2): 298-315.

DOI：10.3102/1076998610393969

• bias
• dichotomous response
• generalized partial credit model
• item-weighted likelihood
• mixed-type test
• polytomous response

For mixed-type tests composed of both dichotomous and polytomous items, polytomous items often yield more information than dichotomous ones. To reflect the difference between the two types of items, polytomous items are usually pre-assigned with larger weights. We propose an item-weighted likelihood method to better assess examinees' ability levels. Simulation results show that the estimated ability based on the new procedure is more consistent with examinee's true ability than the usual maximum likelihood method.

• 出版日期2012-4
• 单位东北师范大学