Although there are only a few runners on your college track team, you see a woman on campus who has the physique of a runner. you decide that she's a member of the track team. your conclusion is based on

The answer is Representativeness Heuristic. It is a type of heuristic used when making judgments. It is making conclusions from the probability of an event under uncertainty. The determinant of the situation above is similarity. Since the woman has the physique of a runner, it has been already concluded that she is a runner.