RELIABILITY AND VALIDITY OF THE JAPANESE VERSION OF THE YALE-BROWN OBSESSIVE-COMPULSIVE SCALE

The reliability and validity of the Japanese version of the Yale-Brown Obsessive-Compulsive Scale (JY-BOCS) were determined by 20 raters for 12 Japanese patients with obsessive compulsive disorder at four insti tutions. Interrater reliability for the total JY-BOCS score was excell ent, and the intraclass correlation coefficient was high (ICC=0.960). Internal consistency was also excellent (Cronbach's alpha=0.889). Conc urrent and discriminant validity of the JY-BOCS was examined by compar ing the scores on the JY-BOCS with those on the Maudsley Obsessional C ompulsive Inventory (MOCI) and scales for depression and anxiety. A sl ight correlation was found between scores on the JY-BOCS and MOCI, but no significant correlations were found between scores on the JY-BOCS and those on scales for depression or anxiety.