Fig. 1
From: Evaluating allied health students’ readiness for placement learning
Item-student map
Item-student map representing all assessment data. Item difficulty (left of centre line) are mapped against student abilities (right of centre line). Students' ability is arranged from highest performing to lowest performing, and item difficulty is from most difficult to least difficult. The mean student ability ('M' on right of centre line) is higher than the mean of item difficulty ('M' on left of centre line). S = 1 standard deviation, T = 2 standard deviations