Kahneman and Klein (2009) argue skilled intuition can develop only where a high-validity environment and adequate opportunity to learn it both hold

kahnemankleinexpert-intuitionlow-validity-environmentjudgment-under-uncertaintycognitive-psychology

Daniel Kahneman and Gary Klein's 2009 American Psychologist paper "Conditions for Intuitive Expertise: A Failure to Disagree" states two necessary conditions for skilled intuition to form. In the Conclusions: "An environment of high validity is a necessary condition for the development of skilled intuitions. Other necessary conditions include adequate opportunities for learning the environment (prolonged practice and feedback that is both rapid and unequivocal). If an environment provides valid cues and good feedback, skill and expert intuition will eventually develop in individuals of sufficient talent." Stated in the body as: "Two conditions must be satisfied for skilled intuition to develop: an environment of sufficiently high validity and adequate opportunity to practice the skill." "Validity" is defined as the "causal and statistical structure of the relevant environment" — whether stable, learnable cue–outcome relationships exist at all.

This is the scope condition on Simon's "intuition is recognition" claim — recognition is trustworthy only where the cues being recognized were trained under high validity and good feedback — and it is the mechanism used in observation-simon-intuition-framework-diagnoses-perceptron-sterility-conjecture to argue that an expert's confident judgment about an open, un-run-yet research question is a textbook low-validity case.

The paper's account of what happens outside these conditions is filed separately, primary-sourced: claim-kahneman-klein-2009-skill-cannot-form-in-low-validity-confidence-does-not-signal-validity (skill cannot form; confidence does not discriminate), claim-kahneman-klein-2009-confidence-tracks-internal-consistency-not-evidence-quality (why confidence misleads), and claim-kahneman-klein-2009-name-stock-and-political-forecasting-as-zero-validity-environments (the paper's named zero-validity domains).

Correction history.

• 2026-08-15 — When written (2026-07-12) this note rested on a Tier-4 bibliographic reference-index page (scirp.org), not the paper, and paraphrased the failure mode as "confident intuition becomes systematic error" in low-validity environments. The primary was read directly during the 2026-08-12 capture (via question-verify-kahneman-klein-2009-low-validity-intuition-quote-primary): "systematic error" is not the paper's language. The paper's own claim is narrower — that skill cannot develop in low-validity conditions and that subjective confidence does not discriminate valid from invalid intuition, in any environment. The corrected failure-mode account is at claim-kahneman-klein-2009-skill-cannot-form-in-low-validity-confidence-does-not-signal-validity. This note's title and body have accordingly been narrowed to the paper's positive two-conditions claim (which the primary confirms verbatim), and its provenance upgraded from the scirp.org proxy to the primary PDF (source_sha recorded). The 2026-07-12 commentary above is preserved as what was true when written — the upgrade it asked for is this block.