Psychological Medicine

Research Article

A self-report scale predictive of drug compliance in schizophrenics: reliability and discriminative validity

Thomas P. Hogana1 c1, A. G. Awada1 p1 and Robin Eastwooda1

a1 Queen Street Mental Health Centre Clarke Institute of Psychiatry, Toronto, Canada


Schizophrenic patients' self-reports of their experience of neuroleptic treatment were used as the basis for the construction of a scale predictive of drug compliance. Reliability analysis of the responses of 150 patients indicated high internal consistency in the 30-item scale, and preliminary validation in the form of discriminant classification accurately assigned 89% of the sample to compliant and non-compliant groupings. Both discriminant and factor analyses suggest that maximum variability in responding is accounted for by items reflecting how the patient feels on medication, rather than what he knows or believes about medication.


c1 Address for correspondence: Mr T. P. Hogan, Department of Psychology, Queen Street Mental Health Centre, 1001 Queen Street west. Toronto, Canada, M6J 1H4.

p1 Present address:Department of Psychiatry, Toronto Western Hospital.