746 Assessment Measures
able, he or she may indicate a corrected score in the raw item score box. Based on findings
from the DSM-5 Field Trials in adult patient samples across si x sites in the United States
and one in Canada, DSM-5 recommends calculation and use of average scores for each domain
and for general disability. The average scores are comparab le to the WHODAS 5-point scale,
which allows the clinician to think of the individual’s disability in terms of none (1), mild
(2), moderate (3), severe (4 ), or extreme (5). The averag e domain and general disability
scores were found to be reliable, easy to use, and clinically useful to the clinicians in the
DSM-5 Field Trials. The average domain score  is calculated by dividing the raw domain score
by the number of items in the domain (e.g., if all the items within the “understanding and
communicating” domain are rated as being moderate then the average domain score
would be 18/6=3, indicating moderate disability). The average general disability score  is cal-
culated by dividing the raw overall score by nu mber of items in the measure (i.e., 36). The
individual should be encouraged to complete a ll of the items on the WHODAS 2.0. If no re-
sponse is given on 10 or  more items of the measure (i.e.,  more than 25% of the 36 total
items), calculation of the simple and average general disability scores may not be helpful.
If 10 or more of the total items on the measur e are missing but the items for some of the do-
mains are 75%–100% complete, the simple or aver age domain scores may be used for those
domains.