“…Katz, Kellerman, and Siegel (1980) studied 115 children with cancer who were undergoing bone marrow aspirations to develop a reliable and valid measurement scale of behavioral distress. Given the difficulty in distinguishing between anxiety and acute pain, since these terms refer to constructs (Shacham & Dant, 1981), Katz, Kellerman, and Siegel (1981) defined behavioral distress as a general tern that encompasses the biobehaviors of negative affect, including anxiety, fear, and acute pain. Katz, Kellerman, and Siege1 (1980) found that behavioral distress (crying, clinging, screaming, verbal statements of pain or fear, flailing, and muscular rigidity) in response to bone marrow aspirations, as measured by the Procedural Behavior Rating Scale (PBRS), was virtually ubiquitous and did not decrease in the children studied.…”