. Author manuscript; available in PMC: 2024 Jun 1.

Published in final edited form as: J Pers Soc Psychol. 2023 Jun;124(6):1277–1298. doi: 10.1037/pspp0000463

Table 5.

Description of Data Sources for Study 2

Sample	Sample size	M_age (SD)	Age range	% Female

NPI	32,248	31.87 (12.47)	15–86	56.8
HSNS	34,922	29.19 (11.34)	18–99	38.2
DDN	32,277	28.91 (11.28)	18–99	35.9
PES	20,532	45.75 (14.67)	18–94	63.1
DSM-IV NPD	34,653	49.06 (17.30)	20–89	57.97
NARQ-S	19,591	33.46 (15.73)	14–96	65.8
SINS	139,748	42.53 (13.99)	18–99	54.0
B-PNI	5,802	31.34 (13.38)	18–77	72.0

Note. These are measure/data set-specific sample sizes which includes redundant participants that are included in data sets (see Table 2) that include multiple measures of narcissism. Note, some participants had missing data on one or two variables.