PERC 2019 Abstract Detail Page
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| Abstract Title: | Multidimensional Item Response Theory and the Force and Motion Conceptual Evaluation |
|---|---|
| Abstract: | Using data from 4528 student responses to the Force and Motion Conceptual Evaluation (FMCE), we applied Multidimensional Item Response Theory (MIRT) Exploratory factor analysis, and identified a 10-factor model. However, much of the optimal factor structure was related to the blocking of items into a group with a common stem. A confirmatory analysis, which constrained the MIRT models to a theoretical model constructed from expert solutions, produced a model requiring only 8 principles, fundamental reasoning steps. This was substantially fewer than that identified in the Force Concept Inventory FCI. Correlation analysis also demonstrated that the two instruments were very dissimilar. The reduced number of principles allowed the extraction of eight single-principle subscales, seven with Cronbach's alpha greater than the 0.7 required for acceptable internal consistency. |
| Abstract Type: | Contributed Poster Presentation |
| Session Time: | Poster Session I |
| Poster Number: | A54 |
Author/Organizer Information | |
| Primary Contact: |
Jie Yang West Virginia University |
| Co-Author(s) and Co-Presenter(s) |
John Stewart |
