Cambridge Depersonalisation Scale, CDS

Test scores

Given that depersonalisation often is intermittent there was little option to creating an index of intensity for each item out of the arithmetic sum of its ratings for frequency and duration. In this way at least the clinically valid observation is saved that a patient experiencing frequent but short-lived depersonalisation experiences should be rated as suffering from an equivalent degree of intensity to someone having less frequent but long-lasting experiences.

The best compromise between true positive and false negative rates is at a cut-off of 70.