Jack Dikian
May 2011
Researchers from the National Institutes of Health asked if people had ever experienced symptoms associated with NPD in their lifetime. They expected that older people would have a much higher rate than younger people since they have lived more years. However, the data showed only 3% of people over 65 had ever experienced NPD, compared to nearly 10% of people in their twenties.
According to researchers at the University of South Alabama, from 2002 to 2007, college students' scores on the Narcissistic Personality Inventory (NPI) rose twice as fast as was found in an earlier study that covered changes between 1982 and 2006.
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