Cambridge Depersonalisation Scale (CDS)

The CDS is a 29-item self-report measure of depersonalisation and derealisation experiences, developed by Sierra and Berrios in 2000. It is the most widely used instrument for assessing dissociative symptom severity in both clinical and research settings, valuable for identifying depersonalisation disorder, monitoring treatment response, and understanding the prevalence of depersonalisation in anxiety, mood, and trauma populations.