Categories English Item difficulty in IRT is the ability at which the probability of successes on the item is Post author By esimpk Post date December 9, 2021 No Comments on Item difficulty in IRT is the ability at which the probability of successes on the item is A: 0.5 B: 0.10 C: 0.6 D: 1.0 ← The G theory provides a framework for conceptualizing, investigating and designing → A conditions when an item functions differently for respondents from one group to another , for controlling for differences between the groups on underlying trait is called Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.