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README.md
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## Scoring
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`score.py` computes Capability, the mean of Intelligence and Calibration,
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- Intelligence: accuracy corrected for chance, per question type and difficulty tier (tier weights: easy 0.1,
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- Also reported, not part of Capability: for the 129 calibration items, the mean distance between the predicted and
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the true probabilities (`target_probs`), measured as total variation distance (0 = exact, 1 = completely wrong).
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Note: JevBench v1.6 counts a yes/no answer with P(yes) between 0.2 and 0.8 as an abstention, which is scored as
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wrong. OpenDecisions drops this rule. The exact definitions are in the docstring of `score.py`.
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We ran 17 public systems the way their authors serve them and scored them with JevBench v1.6's own rule. For the 14
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with an official Capability of 55 or more, OpenDecisions ranks them close to the official JevBench v1.6.1 board
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(Spearman correlation 0.90).
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## Leaderboard (October 15, 2026)
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## Changes
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- **1.0.1** (October 15, 2026): removed fields
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`panel_probs`, `provenance.label_basis`, `panel.flag`); added `trap_answer`; documented `target_probs`; `score.py`
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also reports the distance to the true probabilities on the calibration items; quick start added; the split is
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named `test` instead of `train`; leaderboard added. Items, labels and scores are unchanged.
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## Licence
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## Scoring
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`score.py` computes Capability, the mean of Intelligence and Calibration, with one
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change for yes/no questions.
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- Intelligence: accuracy corrected for chance, per question type and difficulty tier (tier weights: easy 0.1,
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- Also reported, not part of Capability: for the 129 calibration items, the mean distance between the predicted and
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the true probabilities (`target_probs`), measured as total variation distance (0 = exact, 1 = completely wrong).
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## Leaderboard (October 15, 2026)
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## Changes
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- **1.0.1** (October 15, 2026): removed stray fields; added `trap_answer`; documented `target_probs`; `score.py`
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also reports the distance to the true probabilities on the calibration items; quick start added; the split is
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named `test` instead of `train`; leaderboard added. Items, labels, and scores are unchanged.
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## Licence
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