Glossary · Measurement and evaluation
Ground truth
The reference answer or label against which output is evaluated. In subjective or changing domains, it may be a negotiated judgment rather than objective truth.
Terms this definition uses
Measurement and evaluation
How a measurement earns trust: evaluation sets, error rates, calibration, reproducibility, and the biases that make a number look better than it is.
Benchmark · Evaluation set · Golden dataset · Human evaluation · LLM-as-judge · Pairwise evaluation · Pointwise evaluation · Rubric · Inter-rater agreement · Accuracy · F1 score · False positive rate · False negative · True positive · True negative · Calibration · Confidence score · Coverage · Abstention · Reproducibility · Repeatability · Variance · Confidence interval · Sample size · Sampling bias · Selection bias · Survivorship bias · Data leakage · Test contamination
← Golden dataset · Human evaluation →
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