Daniel Kahneman, Ed Diener, and Norbert Schwarz, eds., Well-Being: The Foundations of Hedonic Psychology (New York: Russell Sage Foundation, 1999), 218.
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P. T. Costa Jr. and R. R. McCrae, NEO PI-R Professional Manual (Odessa, FL: Psychological Assessment Resources, Inc., 1992), 15; Susan Cain, Quiet: The Power of Introverts in a World That Can’t Stop Talking (New York: Crown, 2012).
