%0 Journal Article %J Applied Psychological Measurement %D 2018 %T Latent Class Analysis of Recurrent Events in Problem-Solving Items %A Haochen Xu %A Guanhua Fang %A Yunxiao Chen %A Jingchen Liu %A Zhiliang Ying %X Computer-based assessment of complex problem-solving abilities is becoming more and more popular. In such an assessment, the entire problem-solving process of an examinee is recorded, providing detailed information about the individual, such as behavioral patterns, speed, and learning trajectory. The problem-solving processes are recorded in a computer log file which is a time-stamped documentation of events related to task completion. As opposed to cross-sectional response data from traditional tests, process data in log files are massive and irregularly structured, calling for effective exploratory data analysis methods. Motivated by a specific complex problem-solving item “Climate Control” in the 2012 Programme for International Student Assessment, the authors propose a latent class analysis approach to analyzing the events occurred in the problem-solving processes. The exploratory latent class analysis yields meaningful latent classes. Simulation studies are conducted to evaluate the proposed approach. %B Applied Psychological Measurement %V 42 %P 478-498 %U https://doi.org/10.1177/0146621617748325 %R 10.1177/0146621617748325