A note on the science behind Traitwise
Julian Hohlweg
Co-Founder, Traitwise
Hiring is one of the most consequential decisions a company makes, yet it is still often based on weak information. CVs, case studies, and interviews can provide context, but they are limited predictors of job success. When companies hire repeatedly on weak signals, the cost is not only lower performance. Weak and mediocre hires consume leadership attention, slow execution, and pull focus from the business.
Traitwise was built with one objective: maximize predictive validity in hiring. That objective shaped the choice of constructs, the design of the assessment, and the way results are combined. The aim was not to assemble plausible tests. It was to build around the signals science has shown to matter most for job success, role fit, and sustained performance.
Traitwise therefore combines several science-based perspectives. Cognitive ability remains one of the strongest predictors of job performance. Personality adds another layer, with conscientiousness as the clearest noncognitive predictor and broader personality structure providing a fuller picture of how a person is likely to operate. Vocational interests and RIASEC-based fit matter because long-term performance depends not only on capability but on intrinsic drive. Profile-level congruence adds further precision. Agency-related constructs such as self-efficacy and internal locus of control matter especially in environments defined by ambiguity, rapid change, and increasing AI leverage.
These signals do not exist in the abstract. A trait can be predictive in general and still require a different interpretation across roles. The same is true for motivational fit. Assessment quality therefore depends not only on choosing the right constructs, but on calibrating them to real job contexts, normative references, and role-specific success patterns. This is where quality is won or lost: in the curation of the variables, the design of the measurement, and the logic by which the parts are combined.
Traitwise was built to solve that problem. It helps companies identify stronger candidates earlier, make fewer costly hiring mistakes, and place the right people in the right seats. The practical result is simple: fewer preventable hiring issues, less time spent correcting them, and more focus on what matters most, building the business.
Selected references
- Sackett, P. R., Demeke, S., Bazian, I. M., et al. A Contemporary Look at the Relationship Between General Cognitive Ability and Job Performance. Journal of Applied Psychology, 2024.
- Schmidt, F. L., & Hunter, J. E. The Validity and Utility of Selection Methods in Personnel Psychology: Practical and Theoretical Implications of 85 Years of Research Findings. Psychological Bulletin, 1998.
- Wilmot, M. P., & Ones, D. S. A Century of Research on Conscientiousness at Work. PNAS, 2019.
- Nye, C. D. Assessing Interests in the Twenty-First-Century Workforce: Building on a Century of Interest Measurement. Annual Review of Organizational Psychology and Organizational Behavior, 2022.
- Nye, C. D., Su, R., Rounds, J., & Drasgow, F. Interest Congruence and Performance: Revisiting Recent Meta-Analytic Findings. Journal of Vocational Behavior, 2017.
- Judge, T. A., & Bono, J. E. Relationship of Core Self-Evaluations Traits with Job Satisfaction and Job Performance: A Meta-Analysis. Journal of Applied Psychology, 2001.
- Ham, A. It's Time to Streamline the Hiring Process. Harvard Business Review, July 11, 2022.
Julian Hohlweg
Co-Founder, Traitwise