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Researchers have suggested that subjective age, most frequently conceptualized and measured as how old someone feels, may predict important work and life outcomes. In this article, we challenge this assumption by examining the incremental predictive validity of subjective age. Specifically, we propose that subjective age is related to important work and life outcomes (i.e., self-rated task performance, job engagement, emotional exhaustion, career satisfaction, and life satisfaction) when controlling for chronological age. However, based on core self-evaluations theory and the lifespan theory of control, we argue that these relationships are confounded by core self-evaluations (i.e., people’s fundamental evaluations of themselves) and, thus, become weak and nonsignificant when controlling for core self-evaluations. We tested our hypotheses using employee data from a cross-sectional study ( N  = 295), a 2-wave study across 6 months ( N  = 659), and another cross-sectional study ( N  = 316). Across studies, and consistent with expectations, chronological age was positively related to subjective age, whereas core self-evaluations were negatively related to subjective age when controlling for chronological age. In addition, most relationships of subjective age with work and life outcomes became weaker and nonsignificant when core self-evaluations (as well as physical health and perceived work ability as further potential confounding variables included in Studies 2 and 3) were controlled for. By and large, our findings suggest that subjective age does not predict important work and life outcomes above and beyond chronological age, core self-evaluations, and perceived work ability.

Just a Mirage: On the Incremental Predictive Validity of Subjective Age