Abstract
The level of experience at which emotional states are differentiated is discussed. The possible development of the vocabulary of emotion is traced, and it is hypothesized that developed countries show a greater differentiation of emotional states than developing countries. This hypothesis was confirmed using data from the International Pilot Study of Schizophrenia, which includes five developed and four developing countries. Data from another transcultural study, the U.S. : U.K. Project indicated that a group of American negro patients showed significantly less emotional differentiation than a matched group of white American patients.

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