Individual
*Asamoah, N.A., Turner, R.C., Lo, W., Crawford, B.L., Jozkowski, K.N., & McClelland, S.I. (2022, April 21 - April 26). Applying Partial Credit Trees as a Multi-Indicator DIF Screening Tool in Scale Development. American Educational Research Association (AERA) Annual Meeting, San Diego, CA, and virtual.
The purpose of this study is to use partial credit trees, a relatively new differential item functioning (DIF) procedure that allows for multiple group comparisons within a single analysis, as a pilot screener for item performance in new scale development. An abortion legality attitude scale with four response formats was investigated: four-, five-, six-, and seven-points. The four item sets were analyzed for DIF that might be influenced by response format as these same items exhibited DIF with a two-point response condition. Results indicate no difference in threshold parameters for subgroups of respondents as identified by four demographic variables for three of the four scales which contrasts with prior results using a dichotomous version of the same scale.