Utilizing facial recognition technology, the current study has attempted to predict the likelihood of student conceptual change with decision tree models based on the facial micro-expression states (FMES) students exhibited when they experience conceptual conflict. While conceptual change through conceptual conflicts in science education is a well-studied field, there is little research done on conceptual change through conceptual conflict in terms of students' facial expressions. As facial expressions are one of the most direct and immediate responses one can get during instruction and that facial expressions are often representations student's emotions, a link between students' FMES and learning was explored. Facial data was collected from 90 tenth graders. Only data from the 72 students who made incorrect predictions were analyzed in this study. The concept taught was the relationship between boiling point and air pressure. Through facial recognition software analysis and decision tree models, the current study found Surprised, Sad and Disgusted to be key FMES that could be used to predict student conceptual change in a conceptual conflict-based scenario.
Kinematics is an important but challenging area in physics. In previously published works of the current research project, it was revealed that there is a significant relationship between facial microexpression states (FMES) changes and conceptual conflictinduced conceptual change. Consequently, the current study integrated FMES into a kinematics multiple representation instructional scenario to investigate if FMES could be used to help construct students' conceptual paths, and help predict students' learning outcome. Analysis revealed that types of students' FMES (neutral, surprised, positive, and negative) were important in helping instructors predict students' learning outcomes. Findings showed that exhibiting negative FMES through all three major representation segments of the instructional process (i.e., scientific demonstration, textual instruction, and animated instruction) suggests a higher probability of conceptual change among students with sufficient background knowledge on the topic. For students with insufficient prior knowledge, the result was the opposite. Moreover, animated representation was found to be critical to the prediction of student conceptual change. In sum, the results showed FMES as a viable indicator for conceptual change in kinematics, and also reaffirmed the importance of prior knowledge and representations of scientific concepts.
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