Confidence is like a kind of magic. With it, you can accomplish a lot of unexpected things and get a full sense of accomplishment. Confidence is a kind of charm that will make ordinary people shine. How important is your confidence? Psychological function of self-confidence Self-confidence is a psychological characteristic that reflects an individual's ability to trust in his or her ability to successfully complete an activity. It is a positive and effective expression of self-worth, self-respect, self-understanding, and psychological state. For confidence. Self-confidence has the following psychological functions.