Reliability of the Dissociative Trance Disorder Interview Schedule: A preliminary report.

One hundred inpatients in a hospital-based Trauma Program in the USA were interviewed with the Dissociative Trance Disorder Interview Schedule (DTDIS). There were no significant differences for the DTDIS total score or any of the subscale scores on test-retest: all t-values comparing the two administrations of the DTDIS were below 0.7, and all p-values were above 0.5. Cronbach's alpha for the US sample was 0.966 and for the Israeli sample it was 0.971. The findings indicate that the DTDIS has good reliability and may be suitable for use in cross-cultural research; however, the results require replication by independent researchers in a variety of cultures and languages, and in both clinical and nonclinical samples.