What is Cognitive Behavioural Therapy? Cognitive Behavioural Therapy (CBT), developed in the 1960s by Dr. Aaron T. Beck, is a form of psychotherapy that aims to modify dysfunctional emotions, behaviours, and thoughts.It does this by interrogating and uprooting negative or irrational beliefs based on the understanding that our thoughts, feelings, and actions are interconnected.Altering one aspect in this triad can positively impact the others, thereby improving overall well-being. This approach makes CBT a popular and evidence-based method for treating a wide array of psychological issues