Chapter 9 discusses the role of the RP in interventions, which are fundamental and essential activities that increase the functioning of individuals with disabilities, enhance their quality of life, and help restore them to satisfying and productive lives, and how the RP must ascertain and implement appropriate intervention(s) for given individuals as well as monitor their progress, and modifying treatments as needed. It covers how intervention may be provided on an individual level or with couples and/or families, and how it may address psychological issues (e.g., coping, denial, depression, interpersonal relationships), physical issues (e.g., movement disorders), or cognitive dysfunction (e.g., impaired attention; executive dysfunction). Lastly, it covers the wide array of interventions may be utilized including accommodations, assistive technology, cognitive rehabilitation techniques, medication and behavioral programs, and how some interventions are general and adaptable to a variety of functional states, while others are more condition-specific (e.g., constraint-induced movement therapy for movement disorders; use of the PLISSIT model in treating sexual dysfunction).