Published online by Cambridge University Press: 06 January 2022
This chapter discusses the philosophical and historical underpinnings of CBT. Attention is given to how CBT and REBT developed, and how these differ in terms of points of theory and intervention. Concepts such as ‘perfectionism’, ‘intolerance of uncertainty’, and ‘self-compassion’ are discussed regarding possible commonalities these approaches share with ideas posited by early theorists. Specific attention is given to Ellis’s ABC model of personality and how it is currently utilized within CBT. Recent developments within CBT such as ACT are included. Protocol-driven CBT and the possible implications for quality of CBT training (e.g., Improving Access to Psychological Treatments, UK training courses) are included.