The measurement of abnormal illness behavior: Toward a new research agenda for the Illness Behavior Questionnaire

Abnormal illness behavior (AIB) refers to a maladaptive manner of experiencing, evaluating, or acting in response to health and illness that is disproportionate to evident pathology. The construct was originally informed by the sociological notions of the sick role and illness behavior. The present article provides a comprehensive review of the conceptual and empirical development of AIB with a detailed insight into the variety of illness contexts to which it has been applied using the Illness Behavior Questionnaire (IBQ). While the relevance of AIB continues to be demonstrated within the prescribed contexts of the chronic pain and psychiatric literatures, criticisms of AIB and its measurement have arisen when researchers have attempted to move beyond these contexts. In recognition of these criticisms, this article presents a new research agenda to address key limitations that currently impede the broader development and application of AIB. Most importantly, it is proposed that greater consideration needs to be given to the definition of AIB according to type of illness and for general community members without a current illness. The article concludes with comment on the potential practical implications of any future reconceptualization of AIB, including the need to reconsider the manner in which IBQ scores are derived and interpreted, and the need for caution when applying the label “abnormal” in specific illness contexts.