This chapter provides the reader with an overview of (a) the dynamics (i.e., process) of psychosocial adaptation to chronic illness and disabilities (CID), (b) methods commonly used to assess psychosocial adaptation to CID, and (c) intervention strategies applied to people with CID. The chapter groups the psychosocial adaptation to CID under three headings: basic concepts such as stress, loss and grief, and quality of life, CID-triggered reactions, and CID-related coping strategies. The literature on CID-related coping strategies is vast. The chapter describes only a cursory overview of the most commonly reported strategies, directly related to coping with CID. It first briefly discusses the concept of coping and illustrates its relevance to CID. Over the past half century, a large number of measures of psychosocial adaptation to and coping with CID have been reported in the literature. The chapter reviews only those psychometrically sound measures most frequently reported in the literature.