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Two studies investigated how authenticity is believed to change over time. We tested for two possible trajectories: (1) A simple positive linear progression driven by self-enhancement motives and (2) a linear progression followed by a plateau indicative of the end of the history illusion. Across both studies, participants completed measures of perceived authenticity for different points in their lives. Study 1 was over a relatively short period of time. Study 2 was over the course of the lifespan. Both studies revealed upward linear trends suggesting that participants believe they are becoming more authentic over time. Study 2 also revealed that people perceive particularly high rates of change in the recent past and near future. The preponderance of evidence favored the self-enhancement perspective.
Seto et al. (Fri,) studied this question.