Which defense mechanism is characterized by faking an opposite belief due to anxiety regarding one's reality?

The correct answer is reaction formation. This defense mechanism occurs when an individual feels anxiety due to a particular belief or reality that they find unacceptable or threatening. Instead of acknowledging these feelings, the individual adopts the opposite belief or behaves in a manner that is contrary to their true feelings. This behavior stems from an attempt to reduce anxiety by masking the unacceptable thoughts or feelings.

For example, a person who has unacknowledged feelings of anger towards someone might instead treat that person with exaggerated kindness, demonstrating reaction formation. It serves as a coping strategy to protect the individual from confronting the uncomfortable emotions directly. Understanding this mechanism is essential in therapeutic contexts and can aid instructors in discussing complex psychological concepts effectively.