This research examines whether particular soft skill measurement approaches and skill types—like communication and teamwork—reliably predict success in the job market. After reviewing 50 high-quality studies spanning 40 years, researchers found limited evidence linking specific soft skill measures to employment outcomes. While some skill types, such as aspirations and grit, demonstrate more consistent links to labor market outcomes, the evidence remains limited, relying on only a handful of studies. No single soft skill measurement approach reliably predicts outcomes across different settings. These findings suggest policymakers and practitioners should be cautious in adopting any single approach for workforce assessments, interventions or monitoring and evaluation efforts, and should consider using a range of measures and conducting ongoing evaluations to assess their predictive validity in specific contexts.