V2EX true-positive

True-Positive

释义 Definition

(统计学/医学检验/机器学习中)真阳性:实际为“阳性/有问题/有病”的样本,被检测或模型判断为“阳性/有问题/有病”的结果。常用于混淆矩阵与诊断准确性评估。

发音 Pronunciation (IPA)

/tru pztv/

例句 Examples

The test produced 30 true positives.
这项检测得出了30个真阳性结果。

In medical screening, increasing sensitivity can raise the number of true positives, but it may also increase false positives, so clinicians must balance both.
在医学筛查中,提高灵敏度可能会增加真阳性的数量,但也可能增加假阳性,因此临床医生需要在两者之间权衡。

词源 Etymology

true 表示“真实的、正确的”,positive 在检验语境里表示“阳性”。合起来的 true positive 是在统计分类与诊断评估中形成的术语,用来对照 false positive(假阳性) 等概念,描述“判断为阳性且确实为阳性”的情况。

相关词 Related Words

文学与著作 Literary Works

  • Signal Detection Theory and Psychophysics(Green & Swets)
  • The Elements of Statistical Learning(Hastie, Tibshirani & Friedman)
  • Pattern Recognition and Machine Learning(Christopher M. Bishop)
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