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Lack of a suitable measuring device hampered the empirical study of narcissism until Raskin and Hall (1979) developed the Narcissistic Personality Inventory (NPI). The NPI possesses desirable psychometric properties, and in this article I used the scale in a variety of studies. Factor analysis of the scale replicated the four-factor solution found by Emmons (1984): Leadership/Authority, Self-Absorption/Self-Admiration, Superiority/Arrogance, and Exploitiveness/Entitlement. The Exploitiveness/Entitlement subscale was found to correlate with measures of pathological narcissism and affective intensity and variability. The relevance of Linville's (1982) theory of self-complexity-affect intensity for understanding aspects of narcissism is outlined. Implications of the study of narcissism for attribution theory and research are discussed.
Robert A. Emmons (1987) studied this question.