Learning-induced uncertainty reduction in perceptual decisions is   task-dependent

doi:10.3389/fnhum.2014.00282

CORC > 北京大学 > 心理与认知科学学院

	Learning-induced uncertainty reduction in perceptual decisions is task-dependent
	Yang, Feitong ; Wu, Qiong ; Li, Sheng
刊名	frontiers in human neuroscience
	2014
关键词	uncertainty learning perceptual decision categorization Glass pattern HUMAN BRAIN PARIETAL CORTEX NEURAL SYSTEMS REPRESENTATION CATEGORIZATION CONFIDENCE SHAPES AREA
DOI	10.3389/fnhum.2014.00282
英文摘要	Perceptual decision-making in which decisions are reached primarily from extracting and evaluating sensory information requires close interactions between the sensory system and decision-related networks in the brain. Uncertainty pervades every aspect of this process and can be considered related to either the stimulus signal or decision criterion. Here, we investigated the learning-induced reduction of both the signal and criterion uncertainty in two perceptual decision tasks based on two Glass pattern stimulus sets. This was achieved by manipulating spiral angle and signal level of radial and concentric Glass patterns. The behavioral results showed that the participants trained with a task based on criterion comparison improved their categorization accuracy for both tasks, whereas the participants who were trained on a task based on signal detection improved their categorization accuracy only on their trained task. We fitted the behavioral data with a computational model that can dissociate the contribution of the signal and criterion uncertainties. The modeling results indicated that the participants who were trained on the criterion comparison task reduced both the criterion and signal uncertainty. By contrast, the participants who were trained on the signal detection task only reduced their signal uncertainty after training. Our results suggest that the signal uncertainty can be resolved by training participants to extract signals from noisy environments and to discriminate between clear signals, which are evidenced by reduced perception variance after both training procedures. Conversely, the criterion uncertainty can only be resolved by the training of fine discrimination. These findings demonstrate that uncertainty in perceptual decision-making can be reduced with training but that the reduction of different types of uncertainty is task-dependent.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000336125300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Neurosciences; Psychology; SCI(E); PubMed; SSCI; 1; ARTICLE; sli@pku.edu.cn; 282; 8
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/189037]
专题	心理与认知科学学院
推荐引用方式 GB/T 7714	Yang, Feitong,Wu, Qiong,Li, Sheng. Learning-induced uncertainty reduction in perceptual decisions is task-dependent[J]. frontiers in human neuroscience,2014.
APA	Yang, Feitong,Wu, Qiong,&Li, Sheng.(2014).Learning-induced uncertainty reduction in perceptual decisions is task-dependent.frontiers in human neuroscience.
MLA	Yang, Feitong,et al."Learning-induced uncertainty reduction in perceptual decisions is task-dependent".frontiers in human neuroscience (2014).