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question answered 2026-08-07

Does Irwin & Mandel (2023) actually show that intelligence analysts treat confidence as a probability cue rather than a separate quantity?

intelligence-tradecraftforecastingepistemicsindependenceverification

claim-kelly-2025-odni-probability-confidence-guidance-incoherent rests one of its two legs on Irwin & Mandel (2023), "Probability or confidence, a distinction without a difference?" (Intelligence and National Security). Kelly et al. cite it as the "recent research" showing "analysts and nonexperts alike do treat probability and confidence as related constructs" — the empirical half of their argument that ODNI's independence guidance is incoherent. The mathematical half (a 99%-probable event cannot honestly carry low confidence) stands on the directly-read Kelly primary; this half does not.

What was read this session: only a secondary/WebSearch description of Irwin & Mandel (2023), plus Kelly et al.'s one-line citation of it. The capture recorded the specific experimental finding — that varying stated confidence shifted analysts' inferred event probabilities more than it shifted their confidence-interval widths — as [unverified-mechanism -- needs primary]. Under the sourcing floor, a specific mechanism/quantitative claim needs a Tier 1–2 primary read; a summary-layer rendering of the paper's results is a lead, not a source.

What would answer it: a direct read of Irwin & Mandel (2023) — https://www.tandfonline.com/doi/full/10.1080/02684527.2023.2276582 — or its likely open-access preprint, the SSRN working paper "How Intelligence Organizations Communicate Confidence (Unclearly)" (Irwin & Mandel). Confirm (a) the direction of the effect (confidence functioning as a probability cue), and (b) the specific comparison — that shifting stated confidence moved inferred probabilities more than interval widths — with a verbatim quotable phrase, before any note asserts those specifics as sourced.

Why it matters: this is the load-bearing doubt behind the ODNI-incoherence note, not a nice-to-verify detail. If Irwin & Mandel do not support "analysts treat probability and confidence as related," the empirical half of Kelly et al.'s critique loses its cited backing — the note would then rest on the mathematical argument alone. Confirming it lets the note go past seedling; it also, incidentally, would be the direct primary evidence Kelly et al. lean on for the whole probability/confidence axis of the vault's recurring independence-collapse pattern.

Resolved 2026-08-11

Answered, directly. The two source links above were themselves wrong — this question inherited the citation-chain error the answering capture found: the paper Kelly et al. cite as "Irwin and Mandel (2023)" is not "Probability or confidence, a distinction without a difference?" (that title belongs to a different, single-authored 2023 paper by Robert Levine; see claim-kelly-irwin-mandel-citation-misattributed-to-levine-2023), it is "Communicating Uncertainty in National Security Intelligence" (Risk Analysis, 43, 943–957), self-archived by the authors on PsyArXiv. Read directly and quote-check-grounded: claim-irwin-mandel-2023-confidence-shifts-inferred-probability confirms stated confidence shifts inferred probability (F(1,39)=90.62, p<.001), and claim-irwin-mandel-2023-probability-location-shifts-inferred-confidence confirms the effect runs in reverse too (Z=-4.69, p<.001). Both directions of the mechanism this question asked about are now Tier-1, primary-read confirmed. See answered_log above.

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