Modified Personal Questionnaire Rapid Scaling Technique for measuring delusional beliefs

The view of delusions as discrete and discontinuous phenomena is changing. Intensity of conviction in delusional belief has been used as a dependent variable in therapeutic attempts at belief modification. It has been measured using rating scales and developments of Shapiro's Personal Questionnaire (PQ) technique. The use of Mulhall's Personal Questionnaire Rapid Scaling Technique (PQRST) has not been reported in this context. The paper reports no new clinical data but describes a modified PQRST for measuring intensity of belief conviction, suitable for clients who cannot understand the PQ technique and easily administered by ward staff.