what is ceiling effect can the ceiling effect be used in research how can the ceiling effect be used in a test why is the ceiling effect of the model used why ceiling effect in irt? if an itr model is used the expected score distribution is skewed and never goes over the maximum score possible. why is ceiling effect in an itr model how to use ceiling effect what is ceiling effect how ceiling effect occurs in a test is ceiling effect a test why might ceiling effect what is the ceiling effect of irt model how does ceiling effect affect score distribution? why is ceiling effect important what is the ceiling effect in irt is ceiling effect a regression what is ceiling effect of the irt model what is ceiling effect? how does ceiling effect work in a rit test