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In number theory, a narcissistic number [1] [2] (also known as a pluperfect digital invariant (PPDI), [3] an Armstrong number [4] (after Michael F. Armstrong) [5] or a plus perfect number) [6] in a given number base is a number that is the sum of its own digits each raised to the power of the number of digits.
The Pathological Narcissism Inventory (PNI), Narcissistic Grandiosity Scale (NGS), Interpersonal Exploitativeness Scale (IES) and Psychological Entitlement Scale (PES) are among those tests that have been researched to replace the NPI, though some don't directly measure narcissism and instead measure a subcategory of narcissism like Entitlement.
Cover of Hare's Psychopathy Checklist-Revised (2nd ed., 2003). The Psychopathy Checklist or Hare Psychopathy Checklist-Revised, now the Psychopathy Checklist—revised (PCL-R), is a psychological assessment tool that is commonly used to assess the presence and extent of psychopathy in individuals—most often those institutionalized in the criminal justice system—and to differentiate those ...
Illustration of the triad. The dark triad is a psychological theory of personality, first published by Delroy L. Paulhus and Kevin M. Williams in 2002, [1] that describes three notably offensive, but non-pathological personality types: Machiavellianism, sub-clinical narcissism, and sub-clinical psychopathy.
Download as PDF; Printable version; In other projects Wikimedia Commons; ... Narcissism in the workplace; Narcissism of small differences; Narcissistic decompensation;
The open letter will be published on Thursday as a paid advertisement in The New York Times, and states that Trump’s “symptoms of severe, untreatable personality disorder — malignant ...
The smallest base greater than binary such that no three-digit narcissistic number exists. 80: Octogesimal: Used as a sub-base in Supyire. 85: Ascii85 encoding. This is the minimum number of characters needed to encode a 32 bit number into 5 printable characters in a process similar to MIME-64 encoding, since 85 5 is only slightly bigger than 2 ...
Download as PDF; Printable version; In other projects ... The Mathworld page says "a total of 88 narcissistic numbers exist in base 10, as proved by D. Winter in 1985".