Human representation of visuo-motor uncertainty as mixtures of   orthogonal basis distributions

doi:10.1038/nn.4055

CORC > 北京大学 > 生命科学学院

	Human representation of visuo-motor uncertainty as mixtures of orthogonal basis distributions
	Zhang, Hang ; Daw, Nathaniel D. ; Maloney, Laurence T.
刊名	NATURE NEUROSCIENCE
	2015
关键词	STATISTICAL DECISION-THEORY MODEL SELECTION PERCEPTION SAMPLES TIME COMBINATION INTEGRATION DETERMINES INFERENCE SKEWNESS
DOI	10.1038/nn.4055
英文摘要	In many laboratory visuo-motor decision tasks, subjects compensate for their own visuo-motor error, earning close to the maximum reward possible. To do so, they must combine information about the distribution of possible error with values associated with different movement outcomes. The optimal solution is a potentially difficult computation that presupposes knowledge of the probability density function (pdf) of visuo-motor error associated with each possible planned movement. It is unclear how the brain represents such pdfs or computes with them. In three experiments, we used a forced-choice method to reveal subjects' internal representations of their spatial visuo-motor error in a speeded reaching movement. Although subjects' objective distributions were unimodal, close to Gaussian, their estimated internal pdfs were typically multimodal and were better described as mixtures of a small number of distributions differing only in location and scale. Mixtures of a small number of uniform distributions outperformed other mixture distributions, including mixtures of Gaussians.; US National Institutes of Health [EY019889]; Alexander v. Humboldt Foundation; McKnight Foundation; James S. McDonnell Foundation Award in Understanding Human Cognition; SCI(E); PubMed; SSCI; ARTICLE; hang.zhang@pku.edu.cn; 8; 1152-+; 18
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/417816]
专题	生命科学学院心理与认知科学学院
推荐引用方式 GB/T 7714	Zhang, Hang,Daw, Nathaniel D.,Maloney, Laurence T.. Human representation of visuo-motor uncertainty as mixtures of orthogonal basis distributions[J]. NATURE NEUROSCIENCE,2015.
APA	Zhang, Hang,Daw, Nathaniel D.,&Maloney, Laurence T..(2015).Human representation of visuo-motor uncertainty as mixtures of orthogonal basis distributions.NATURE NEUROSCIENCE.
MLA	Zhang, Hang,et al."Human representation of visuo-motor uncertainty as mixtures of orthogonal basis distributions".NATURE NEUROSCIENCE (2015).