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Need for power

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  • 3 chapters

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Background

Murray's system of needs

Henry Murray was one of the first psychologists to systematically investigate human needs. In his 1938 book, Explorations in Human Personality, he identified and labeled twenty needs he believed were universal in nature for all humans. Later research demonstrated that Murray's system of needs positively correlates with the Big Five personality traits.

McClelland's three needs theory

In the 1960s, psychologist David McClelland expanded on Murray's work, focusing on the effects of human needs in a work environment. His need theory proposes that most people are consistently motivated by one of three basic desires: the need for affiliation, the need for achievement, or the need for power.

Thematic apperception test

To determine how strongly an individual felt each of the three needs, McClelland used the thematic apperception test (TAT), which is designed to uncover a person's unconscious drives, emotions, wants and needs. During the test, a psychologist shows an individual a series of picture cards depicting ambiguous situations and asks them to tell a story about each image. The psychologist then interprets those stories to identify desires or personality traits the individual may be unaware of or want to hide. Several empirical studies have demonstrated that the TAT cannot detect mental illness at a rate higher than chance, and the inter-rater validity as measured by Cronbach's alpha (the likelihood of two psychologists providing similar interpretations of the same person's results) is low, especially if the clinician gives a subjective interpretation instead of using the test's original scoring system. However, proponents of the TAT argue that Cronbach's alpha is artificially low for tests with a small number of items, and that the TAT provides a more detailed and flexible description of an individual than a structured questionnaire.

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