The Symptom Questionnaire is a simple and quick measure of emotional s
tate; previous work has indicated that the Questionnaire has good reli
ability and validity. However the original sample on which it was base
d was small, and exclusively North American. Data from a large sample
(N = 707) of British psychiatric inpatients, out-patients, day hospita
l attenders, and a non-patient population sample are presented. Consis
tent differences between the patient and non-patient samples were obta
ined on the scales, with a few exceptions; there were no significant d
ifferences due to sex.