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Compute and interpret MAD-based confidence scores for experiment results. Use when logging experiment results after 3+ data points to determine if improvements are real or within noise.
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| name | confidence-scoring |
| description | Compute and interpret MAD-based confidence scores for experiment results. Use when logging experiment results after 3+ data points to determine if improvements are real or within noise. |
| user-invocable | false |
Determines whether an observed improvement is real or within measurement noise using Median Absolute Deviation (MAD).
confidence: null.Given all metric values in the current segment (positive values only):
|value - median|. Take the sorted median of those absolute deviations.keep-status metric value (respecting optimization direction).|best_kept - baseline|delta / MADnull — no measurable noise to compare against.keep results exist yet: return null.null — no improvement to score.The confidence score is a multiple of the session's noise floor:
| Score | Meaning | Action |
|---|---|---|
| ≥ 2.0× | Improvement likely real | Safe to trust |
| 1.0×–2.0× | Marginal — could be noise | Consider re-running to confirm |
| < 1.0× | Within noise floor | Treat as no improvement |
When logging an experiment result to autoresearch.jsonl:
"confidence": null in the JSONL record.keep vs discard: the confidence score is advisory. It never auto-discards. But flag improvements below 1.0× in your ASI notes as "within noise — may not be real."Runs: [15200, 15400, 14800, 15100, 14600]
Median: 15100
Deviations: [100, 300, 300, 0, 500] → sorted: [0, 100, 300, 300, 500]
MAD: 300
Baseline: 15200 (first run)
Best kept: 14600
Delta: |14600 - 15200| = 600
Confidence: 600 / 300 = 2.0× ← improvement is real