Reliability and validity of a Japanese version of the Cambridge depersonalization scale as a screening instrument for depersonalization disorder
Psychiatry and Clinical Neurosciences June 1, 2009 Miyuki Sugiura, Masataka Hirosawa, Sumio Tanaka et al.
A Japanese version of the Cambridge Depersonalization Scale (J-CDS) showed good reliability and validity for screening depersonalization disorder in non-clinical settings. Cronbach's alpha was 0.94 and split-half reliability was 0.93. Scores on the J-CDS were significantly higher in the depersonalization group than in healthy controls and correlated with scores on the Dissociative Experience Scale and its depersonalization subscale. A cut-off score of 60 yielded a sensitivity of 1.00 and specificity of 0.96 for distinguishing individuals with depersonalization disorder from those without psychiatric disorders.