Mannheim Research Colloquium on Survey Methods (MaRCS): Violations of Unidimensionality and Differential Item Functioning in Survey Data: Their Practical Meaning and How We Can Detect Them

I discuss violations of unidimensionality and differential item functioning as two central challenges in the evaluation of survey data. I first provide a non-technical introduction to these terms. Then, I discuss violations of unidimensionality and differential item functioning in the context of item response theory, where violations of unidimensionality and differential item functioning can be seen as model violations. Finally, I present some statistical procedures for detecting these model violations, and point to available implementations in R.

Please use this link to attend the colloquium via Zoom:

https://us02web.zoom.us/j/81804053598?pwd=WUVtaVErWklpSVBBV0N5eGo5eHFkUT09

MaRCS is a seminar series jointly organized by the Mannheim Centre for European Social Research (MZES), the University of Mannheim School of Social Sciences, and GESIS – Leibniz Institute for the Social Sciences.

You can sign-up to the MaRCS mailing list here https://lists.gesis.org/mailman/listinfo/marcs to receive invitations to the upcoming seminars.