Final answer:
In Rational Emotive Behavior Therapy, the 'D' stands for Disputation, which is the process of challenging and altering irrational beliefs to achieve healthier emotional outcomes.
Step-by-step explanation:
The 'D' in the ABCDE model of Rational Emotive Behavior Therapy (REBT) stands for Disputation. This step involves challenging and disputing irrational beliefs and thoughts identified in the earlier steps of the ABCDE model. By disputing these irrational beliefs, individuals can begin to change their negative thought patterns and develop more rational beliefs and healthier emotional outcomes. This is critical because the core of REBT is to help individuals not only identify but also alter these core irrational beliefs that lead to emotional distress. In the larger context of the REBT process, Disputation is a path to moving beyond suffering by focusing on reframing one's cognitive processes to promote better emotional regulation and behavioral change.