Subjective data can usually be verified by more than one observer. Introspective methods involve making reports on one's own mind or thought processes. Deductive methods are sometimes used in science but primarily after inductive methodshave produced some generalizations. A determinist usually explains phenomena by reference to some causes outside of the individual. Environmentalists are usually peripheralists because they emphasize the sensory and motor processes.
Idiographic psychology emphasizes the importance of the individual as a unique person.