Expressed emotion: from predictive index to clinical construct.

Expressed emotion, a measure of family attitudes toward psychiatric patients that is predictive of relapse, has attracted renewed attention recently as interest in the chronic psychiatric patient has widened. The authors review the development of the concept and the limits of its meaning. In seeking the core clinical construct underlying the expressed emotion variable, the authors also review recent studies of the relationship of expressed emotion to family interaction patterns, physiological arousal states, precipitants of relapse, and parental personality style. While family intervention studies are necessary to demonstrate that expressed emotion influences outcome in psychiatric patients, methodological limitations in currently available studies leave this issue unresolved.