Figure 5. Item Characteristic Curves of Words From Trial One of the List.
Item order from left-to-right (top row first and then bottom row) reflects the order of words as presented on the word list. Item characteristic curves show the probability of a correct recall (y-axis) as a function of the latent trait on a z-score metric (x-axis). Item difficulty corresponds to the latent trait value when the probability of a correct response is 0.50. Item discrimination corresponds to the slope of the logistic curve.