It relies on the other intelligences. In fact, some artists become too expert at reading others and become exhausted by it, because they are constantly doing it.
Teachers are highly interpersonally intelligent.
It is probably what drew them into teaching. After several weeks with a class they are able to take the emotional temperature of every child simply by walking into the room. This intelligence also serves us in our personal relationships as well. Guidance counselors, rabbis, priests, reverends, psychiatrists all have a high degree of interpersonal intelligence. Politicians and salesmen often manipulate it as do cult leaders.