Extending interactionist principles and targeting situational specificity of trait–performance linkages, trait activation theory (TAT) posits personality traits are expressed as valued work behavior in response to trait-relevant situational cues, subject to constraints and other factors, all operating at the task, social, and organizational levels. Review of 99 key sources citing TAT spanning 2011–2019 reveals diverse applications (e.g., bidirectionality, trait specificity, team building) and an overall 60% significance rate for 262 TAT-based moderator effects reported in 60 of 75 empirical studies. Applying five key aspects of TAT (e.g., behavior/performance distinction, need-based motivation) to five lines of personality dynamics research (e.g., personality states, self-regulation models of motivation) supports TAT as a vehicle for advancing understanding of within-person variability over brief and extended timelines. Critical research needs include personality-oriented work analysis, longitudinal study of trait-situation processes, trait activation in teams, within-job bidirectionality, and situation relevance as a unifying principle in advancing person–workplace fit.

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