Figure 1.

Breadth of coverage as represented by the general factor score distribution for the sample and the item banks. Activity Limitation/Participation Restriction score distribution for the calibration sample is presented on the left side of the plot. The score distribution for the item bank is presented on the right, calculated by taking the average of the expected values at the sub-factor level and mapping the average expected value onto the general factor score level. (a) Activity Limitation Scale (b) Participation Restriction Scale.