Which school of thought in psychology used the method of trained introspection in research studies?

In ________, a cell duplicates its DNA strand and divides into two cells

Fill in the blank with correct word.

Because pigeonholing people, objects, or events can distort one's perceptions, it is important that a person is wary of labels and stereotypes and tries to see people as individuals and events as unique, one-time occurrences. In this way, one's perceptions will not be distorted by

a. unconscious transference. b. dishabituation. c. sensory adaptation. d. perceptual sets.