Fig. 6
From: Measuring self-reported ability to perform activities of daily living: a Rasch analysis
Item-person distribution map—31 item version of the ADL-I. The most difficult items and the most able participants at the top. Each ‘#’ is 10 persons, each ‘.’ is 1 to 9. Note: Each item is shown in the three columns representing different rating scale measures. Items: Center = the mean item difficulty calibrations; Items: Bottom = measure level corresponding to a probability of 0.5 of being rated in (or exceeding) the lowest category of the rating scale; Item: Top = measure level corresponding to a probability of 0.5 of being rated in (or falling below) the highest category of the rating scale