Fig. 2From: Psychometric properties of the complete version of the World Health Organization Quality of Life Assessment (WHOQOL-OLD): reduced response scaleWHOQOL-OLD Items Characteristic Curve (original). The vertical axis represents the probability of choosing the answer for the item. “nothing” (1), “rarely” (2), “medium” (3), “very” (4), and “completely” (5). (Response options to items)Back to article page