Interpersonal Hostility Assessment Technique: description and validation against the criterion of coronary artery disease.

High levels of hostility are associated with adverse health outcomes. The Interpersonal Hostility Assessment Technique (IHAT; Barefoot, 1992) measures hostility from verbal behavior during a standardized interview. Four types of behaviors are scored as hostility: evading the question, irritation, and indirect and direct challenges to the interviewer. The sum of the frequencies of these acts is a Hostile Behavior Index (HBI), which is divided into two components: verbal, scored with speech content in mind, and paraverbal, based on vocal stylistics. This study examined characteristics of IHAT assessments in 129 male coronary patients. Satisfactory interrater reliabilities were obtained. The HBI correlated highly (.58) with coronary artery disease severity after controlling for traditional risk factors. This relation was not affected by question topic or by differential weighting of the four hostile behaviors. Both HBI components were significantly correlated with disease. Results are discussed in terms of their implications for hostility assessment.