政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/58422

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题名:	A mixed-effects expectancy-valence model for the Iowa gambling task
作者:	Cheng, C. P.;Sheu, C. F.;Yen, Nai-Shing 顏乃欣
贡献者:	政大心理系
日期:	2009-07
上传时间:	2013-06-06 14:25:18 (UTC+8)
摘要:	The Iowa gambling task (IGT; Bechara, Damasio, Damasio, & Anderson, 1994) was developed to simulate real-life decision making under uncertainty. The task has been widely used to examine possible neurocognitive deficits in normal and clinical populations. Busemeyer and Stout (2002) proposed the expectancy-valence (EV) model to explicitly account for individual participants’ repeated choices in the IGT. Parameters of the EV model presumably measure different psychological processes that underlie performance on the task, and their values may be used to differentiate individuals across different populations. In the present article, the EV model is extended to include both fixed effects and subject-specific random effects. The mixed-effects EV model fits the nested structure of observations in the IGT naturally and provides a unified procedure for parameter estimation and comparisons among groups of populations. We illustrate the utility of the mixed-effects approach with an analysis of gender differences using a real data set. A simulation study was conducted to verify the advantages of this approach.
關聯:	Behavior Research Methods, 3(41), 657-663.
数据类型:	article
DOI 連結:	http://dx.doi.org/10.3758/BRM.41.3.657
DOI:	10.3758/BRM.41.3.657
显示于类别:	[心理學系] 期刊論文

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档案	描述	大小	格式	浏览次数
A mixed-effects expectancy-valence model.pdf		119Kb	Adobe PDF2	1347	检视/开启

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