Donald Meichenbaum is considered one of the most influential psychotherapists of the 20th century. He developed cognitive behavioral modification (CBM), which focuses on modifying maladaptive thoughts and inner dialogue. Two techniques of CBM are self-instructional training, where clients learn self-talk strategies, and stress inoculation training, which equips clients to better cope with stressors. CBM aims to help clients develop awareness and control of their thoughts, feelings, and behaviors.