title: A speeded item response model: leave the harder till later.
abstract: A speeded item response model is proposed. We consider the situation where examinees may retain the harder items to a later test period in a time limit test. With such a strategy, examinees may not finish answering some of the harder items within the allocated time. In the proposed model, we try to describe such a mechanism by incorporating a speeded-effect term into the two-parameter logistic item response model. A Bayesian estimation procedure of the current model using Markov chain Monte Carlo is presented, and its performance over the two-parameter logistic item response model in a speeded test is demonstrated through simulations. The methodology is applied to physics examination data of the Department Required Test for college entrance in Taiwan for illustration.
authors.affiliation: Institute of Statistics, National Tsing-Hua University, No. 101, Sec. 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan, ywchang1225@gmail.com.
authors.forename: Yu-Wei
authors.initials: YW
authors.lastname: Chang
authors.forename: Rung-Ching
authors.initials: RC
authors.lastname: Tsai
authors.forename: Nan-Jung
authors.initials: NJ
authors.lastname: Hsu
mesh_terms: D004521:Educational Measurement / Q000379:methods*; D006801:Humans; D008390:Markov Chains; D008962:Models, Theoretical; D009010:Monte Carlo Method; D011594:Psychometrics / Q000379:methods*