Final answer:
During psychodrama, role reversal is the technique that involves taking the part of another person to learn how one's own behavior appears from that person's perspective.
Step-by-step explanation:
During psychodrama, the technique that involves taking the part of another person to learn how one's own behavior appears from that person's perspective is role reversal. Role reversal allows participants to shift their focus from themselves to a character or situation, creating an alter ego through which they can transfer their experiences. By stepping into someone else's shoes, individuals gain new insights and understanding of their own behavior.