Can Rasch analysis indicate which items belong to a certain category?
The item fit statistics will provide insight on the appropriateness of each item assigned to particular item categories under the proposed model.
If you have completed your analytical run, you should receive an output indicating these item fit statistics. Review those against the criteria outlined in the piece by Prof. Linacre entitled "What do Infit and Outfit, Mean-square and Standardized mean?" and presented here: https://www.rasch.org/rmt/rmt162f.htm. Let us know what you uncover.