Self-enhancement by social comparison: a prospective analysis.

A longitudinal investigation showed that self-enhancement by social comparison (assessing whether people perceive themselves more positively than they perceive others) was prospectively related to an increase in self-reported adjustment, controlling for the effects of narcissism. Better adjustment, including higher self-esteem, was not prospectively related to an increase in self-enhancement. The investigation also included a diary period, allowing the assessment of intrasubject covariation between daily reports of self-esteem and daily reports of perceived challenge and daily events (positive or negative). High (compared to low) self-enhancers were less likely to report lower self-esteem under higher challenge and less likely to report higher self-esteem under positive events.