Given the vast amount of research related to behavioral assessment, it is difficult for clinicians to keep abreast of new developments. In recent years, there have been advances in assessment, case conceptualization, treatment planning, treatment strategies for specific disorders, and considerations of new ethical and legal issues. Keeping track of advances requires monitoring diverse resources limited to specific disorders, many of which are theoretical rather than practical, or that offer clinical advice without providing the evidence base for treatment recommendations. This handbook was cre