Assessment Measures 745
World Health Organization
 Disability Assessment Schedule 2.0
The adult self-administered vers ion of the World Health Organization Disability Assessment
Schedule 2.0 (WHODAS 2.0) is a 36-item measur e that assesses disability in adults age 18
years and older. It assesses disability across six domains, including understanding and
communicating, getting around, self-care, gett ing along with people, life activities (i.e.,
household, work, and/or school activities), an d participation in society. If the adult indi-
vidual is of impaired capacity and unable to complete the form (e.g., a patient with demen-
tia), a knowledgeable informant may complete  the proxy-administered version of the
measure, which is available at www.psychiatry. org/dsm5. Each item on  the self-administered
version of the WHODAS 2.0 asks the individual to rate how much difficulty he or she has
had in specific areas of functioning during the past 30 days.
WHODAS 2.0 Scoring Instructions Provided by WHO
WHODAS 2.0 summary scores. There are two basic options for computing the summary
scores for the WHODAS 2.0 36-item full version.
Simple:  The scores assigned to each of the items—“none” (1), “mild” (2), “moderate” (3),
“severe” (4), and “extreme” (5 )—are summed. This method is referred to as simple scoring
because the scores from each of the items are simply added up withou t recoding or collaps-
ing of response categories; thus, there is no we ighting of individual items. This approach is