Final answer:
Dr. Cheng's treatment plan involving shaping, positive reinforcement, negative reinforcement, modeling, role-playing, and addressing negative thought patterns is indicative of cognitive behavioral therapy (CBT), which is a combined approach to address Gary's depression and smoking cessation.
Step-by-step explanation:
Dr. Cheng is practicing cognitive behavioral therapy (CBT). CBT is a type of psychotherapy that combines behavioral and cognitive techniques to treat various conditions, including depression and addiction. Dr. Cheng's treatment plan for Gary involves specifically tailored cognitive and behavioral strategies such as shaping, positive reinforcement, and negative reinforcement.
Additionally, techniques like modeling and role-playing are utilized to address the patient's issues. In combating negative thought patterns, principles from cognitive therapy are employed to challenge distorted cognitions and help Gary rationalize his thoughts more effectively. This holistic CBT approach promotes a commitment to change and leverages various therapeutic strategies to address Gary's needs.