LIWC Research Series:
Among both laypersons and researchers, extensive use of first-person singular pronouns (i.e., I-talk) is considered a face-valid linguistic marker of narcissism. However, the assumed relation between narcissism and I-talk has yet to be subjected to a strong empirical test. Accordingly, the authors conducted a large-scale (N 4,811), multisite (5 labs), multi-measure (5 narcissism measures) and dual-language (English and German) investigation to quantify how strongly narcissism is related to using more first-person singular pronouns across different theoretically relevant communication contexts (identity-related, personal, impersonal, private, public, and stream-of-consciousness tasks).
Carey, A. L., Brucks, M. S., Küfner, A. C. P., Holtzman, N. S., große Deters, F., Back, M. D., Donnellan, M. B., Pennebaker, J. W., & Mehl, M. R. (2015). Narcissism and the use of personal pronouns revisited. Journal of Personality and Social Psychology, 109(3), e1–e15. https://doi.org/10.1037/pspp0000029