Unverified50% confidenceDecision RuleExact time
评估基准测试质量的关键指标是假阳性率和假阴性率，理想基准应将两者控制在较低水平
1
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50%
Confidence
Long-term
Relevance
8/7/2026
First Seen
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Related Claims
UnverifiedIn scenarios with extreme class imbalance (such as fraud detection), looking solely at accuracy as an evaluation metric is completely meaningless.73% similarUnverified假阳性（False Positive）指模型将负类样本（正常内容）错误预测为正类（违规内容）73% similarUnverified困惑度是测试集上每个token平均负对数似然的指数，值越低代表模型对语料的预测越准确71% similarUnverified最优阈值可通过最大化Youden指数（灵敏度+特异度-1）确定，在假阳性与假阴性代价对等时是最优阈值选择准则71% similar
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