作者mangogogo (mangogo)
看板NCTU-STAT95G
标题演讲
时间Fri Sep 22 13:14:14 2006
交通大学、清华大学统计学研究所 专题演讲
时间 95年9月29日(星期五)上午10:40-11:30
(上午10:20-10:40茶会於交大统计所428室举行)
地点 交大综合一馆427室
主讲人 须上英博士（中研院统计所 ）
讲题 PROC Analysis: Effect of Threshold Value for Diagnostic Test
摘要
Binary test outcomes are typically considered as dichotomized versions of a
continuous test variable, observable or latent. The effect of the threshold
for test positivity on test sensitivity and specificity has been studied
extensively in ROC analysis. Considerably less attention has been given to
the study of the effect of the positivity threshold on the predictive value
of a test. In this talk I will present statistical methods for the joint
study of the positive and negative predictive value of diagnostic tests.
We define the Predictive Receiver Operating Characteristic (PROC) curve, which
summarizes the pairs of positive and negative predictive value as the threshold
for test positivity varies. The properties of the PROC curve provide understand
of the effect of the decision threshold for test positivity, as well as the
interplay between the positive and negative predictive value as this threshold
changes. We continue the analysis of the predictive accuracy with the
presentation of the predictive model, which is used to estimate the positive
and negative predictive value jointly. Then we propose summary measures to
quantify and compare predictive performance of diagnostic tests using the
predictive model and the PROC curve.
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1F：推 josephw:这次是中文了( ￣ c￣)y▂ξ 09/22 13:19
2F：推 aflilfesy:希望这次可以听的懂... 今天的演讲都是带腔英文@@" 09/22 13:19
3F：推 mangogogo:练听力~ 09/22 13:22
4F：推 uranuss:对不起 我睡着了 Orz 09/22 13:22
※ 编辑: mangogogo 来自: 140.113.186.117 (09/22 13:28)
5F：推 aflilfesy:没关系... 阿盛也睡着了~ 09/22 13:43
6F：推 josephw:短裤荣也在眯眼睛了 今天没发问 呵呵 09/22 13:44
7F：推 mangogogo:靠 ＠＠ 等等教授有看板 09/22 13:46
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9F：→ mangogogo:OK~ 09/22 18:10
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