Brown Bag Seminar: Chia-Wen Chen
Speaker: Chia-Wen Chen, CEMO
Title: A Mixture Factor Model to Identify Misconceptions with the Certainty of Response Index
Abstract: The certainty of response index (CRI) is an additional question complementing an item on a cognitive test, by which students provide their confidence level in answering that item. CRI has been proposed as a tool to identify students' misconceptions in science and mathematics. This study developed a mixture factor model to combine observed item responses and CRIs to improve the identification of student misconceptions. We fitted the model to data from an algebra test taken by 773 grade-8 students in China. The results suggested the existence of two latent classes consistent with the misconception framework.