Revised NEO Personality Inventory
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The Revised NEO Personality Inventory, or NEO PI-R, is a psychological personality inventory; a 240-question measure of the Five Factor Model: Extraversion, Agreeableness, Conscientiousness, Neuroticism, and Openness to Experience. Additionally, the test measures six subordinate dimensions (known as 'facets') of each of the "Big Five" personality factors. The test was developed by Paul T. Costa, Jr. and Robert R. McCrae for use with adult (18+) men and women without overt psychopathology.
A smaller version of NEO PI-R exists called NEO FFI.
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