Final answer:
A psychologist practicing cognitive therapy helps a patient with major depressive disorder by identifying and changing negative thought patterns.
Step-by-step explanation:
A psychologist who practices cognitive therapy will most likely try to help a patient who suffers from a major depressive disorder by identifying and changing negative thought patterns. Cognitive therapy is a type of psychotherapy that focuses on the relationship between thoughts, feelings, and behaviors. The therapist helps the patient recognize and challenge negative thoughts and develop more positive and realistic thinking patterns. By doing so, the patient can experience improved mood and reduced symptoms of depression.