Assessment of the components of observed chronic pain behavior: the Checklist for Interpersonal Pain Behavior (CHIP).

This article describes the development of the Checklist for Interpersonal Pain Behavior (CHIP), an observation scale which assesses overt pain behavior. The study is an extension of an earlier study in which the dimensions and components of observed chronic pain behavior were examined. A broad definition of pain behavior is chosen (interpersonal pain behavior), namely the interaction between the pain patient and his/her direct environment.