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arXiv 1306.2281stat.MEstat.ML
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三变量相互作用的核检验

A Kernel Test for Three-Variable Interactions

Dino Sejdinovic, Arthur Gretton, Wicher Bergsma

摘要:

我们引入核非参数测试兰开斯特三变量的相互作用和完全独立,使用嵌入到再生核希尔伯特空间的措施。由此产生的检验统计量是简单的计算,并用于强大的相互作用测试,这是一致的,对所有的替代品的一个大家庭的再生内核。我们表明,兰开斯特测试是敏感的情况下,两个独立的原因分别有微弱的影响第三个因变量,但他们的组合效果有很强的影响。这使得Lancaster检验特别适合于在有向图模型中发现结构,在检测这种V结构方面,它优于竞争的非参数检验。

英文摘要:

We introduce kernel nonparametric tests for Lancaster three-variable interaction and for total independence, using embeddings of signed measures into a reproducing kernel Hilbert space. The resulting test statistics are straightforward to compute, and are used in powerful interaction tests, which are consistent against all alternatives for a large family of reproducing kernels. We show the Lancaster test to be sensitive to cases where two independent causes individually have weak influence on a third dependent variable, but their combined effect has a strong influence. This makes the Lancaster test especially suited to finding structure in directed graphical models, where it outperforms competing nonparametric tests in detecting such V-structures.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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