84 Dealing with omitted and not-reached items in competence tests: Evaluating approaches accounting for missing responses in item response theory models (Present by Kuan-Yu on 25 Nov 2013)
Pohl, S., Grafe L., & Rose N. (2013). Dearling with omitted and not-reached items in competence tests: Evaluating approaches accounting for missing responses in item response theory models. Educational and psychological Measurement.