Evidence-Based Recruitment for Agencies
Evidence-based recruitment means every recommendation your agency makes is backed by something a client can independently evaluate — structured assessment results — rather than resting solely on a recruiter’s impression from a screening call.
What the research actually says
Schmidt and Hunter’s meta-analysis of 85 years of personnel-selection research (Psychological Bulletin, 1998) remains the most-cited work on this question, and its conclusion is specific: combining a structured assessment with a structured interview predicts job performance meaningfully better than relying on unstructured interviews or informal judgment alone. That’s not an argument against interviews or references — it’s an argument for combining them with structured evidence rather than treating a conversation as sufficient on its own. For an agency, that combination is also what makes a recommendation defensible when a client pushes back on why one candidate was chosen over another.
Why unstructured judgment fails quietly, not obviously
Kahneman, Sibony, and Sunstein’s Noise (2021) documents a specific failure mode of unstructured judgment: two equally experienced recruiters evaluating the same candidate can reach meaningfully different conclusions, not because either is careless, but because unstructured judgment is inherently noisy — it varies by recruiter, by day, and by what happened in the interview just before. That variability is invisible from the inside; a recruiter trusts their own judgment in the moment regardless of how consistent it actually is across cases. Structured evidence doesn’t remove judgment from the process — it gives that judgment a stable, comparable foundation to work from.
- Assessment evidence sits alongside interviews and references, not in place of them
- Recommendations a client can question and get a real answer to, not just an impression restated more confidently
- A consistent standard of evidence across every placement, not just the high-stakes ones
See Methodology for the full scoring approach.
Frequently asked questions
Does evidence-based recruitment replace the interview?
No — the research specifically supports combining structured assessment with structured interviews, not replacing one with the other.
What’s the difference between structured and unstructured evidence?
Structured evidence uses the same criteria and scale for every candidate, so results are directly comparable; unstructured judgment varies by recruiter and by case, which is harder to defend when a client asks why.
Why does judgment consistency matter if the recruiter is experienced?
Experience doesn’t eliminate the variability Noise documents — even experienced, careful recruiters show inconsistency across similar cases without realizing it, which is exactly why structured evidence adds value rather than being redundant with expertise.
Does this apply to every placement, or just senior roles?
The same standard of evidence applies across every placement — the research doesn’t suggest structured evidence only matters at the senior end.