Replicable Factor Structure and Correlates of an Alternate Version of the Narcissistic Personality Inventory

The Narcissistic Personality Inventory (NPI) traditionally has been administered using 40 pairs of items with a forced-choice response format. However, recent NPI research indicates that it may be advantageous to administer only the item from each pair that is in the narcissistic, keyed direction (i.e., using a “single-stimulus” format) in conjunction with a Likert style response rating scale (Ackerman et al. 2016). This same research and other...