Narcissistic Personality Inventory-13

Participants also completed the NPI-13 and indicated their self-perceived physical attractiveness (e.g., how attractive would you rate yourself?) and daily intensity of improving their appearances. The appearance-improving scale included eight questions that assessed the eight different types of beauty-enhancing behaviours identified in Study 1. Participants specifically indicated the number of minutes (ranging from 1 min to 6 hrs) they spent on each activity per day. Over the next six days, self-perceived physical attractiveness and daily intensity of improving appearances were also assessed.