Fig. 2From: Structural validity of the Arabic version of the disabilities of the Arm, Shoulder and Hand (DASH) using Rasch measurement modelItem characteristic curves for the two testlets (run number 3). Top figure (activity limitation testlet) and bottom figure (impairment testlet) shows fitting items where the observed data (black dots representing data of three groups of subjects with low, moderate, and high upper extremity function) follow the pattern expected by the measurement model (gray line)Back to article page