How can the influence of behavioral factors on health and well-being be measured? Research over the past two decades has shown that psychological factors and lifestyle have been found to be relevant to the onset and course of disease. In addition, these factors codetermine how patients and those in their social environment cope with illness and what their quality of life is. Assessment in Behavioral Medicine gives the reader a greater understanding of the influence of behavioral factors on somatic health. There is a continuing need for research to better our understanding of the processes that play a crucial role in the influence of psychosocial factors on health. However, the proliferation of tools for assessing psychosocial and psychobiological factors makes it difficult to make an optimal choice of measurement. This volume aims to advance the state of measurement in the multidisciplinary fields of behavioral medicine and health psychology by bringing together state-of-the-art theory and research on assessment issues in this area. It provides the reader with an insight into the different kinds of measures that are available, along with practical guidelines for choosing the appropriate tools and designs to meet specific research questions. Assessment in Behavioral Medicine is a unique resource for students, researchers, clinicians and teachers who are involved in education, research or clinical work in which measuring behavioral and psychosocial factors is a crucial activity.