Base-rate and payoff effects in multidimensional perceptual categorization
Base-rate and payoff effects in multidimensional perceptual categorization
复制标题
DOI：
10.1037/0278-7393.24.6.1459
复制
发表时间：
1998-11-01
影响因子：
2.6
通讯作者：
Bohil, CJ
中科院分区：
文献类型：
--
作者：
Maddox, WT;Bohil, CJ
考察了在不同的基本速率和支付条件下多维感知分类性能的最优性。在实验1中，观察者同时学习类别结构和基本比率或收益。观察员表现出保守的截止放置时，回报是不平等的极端截止放置时，基本利率是不平等的。在实验2中，观察者在基本利率或支付操纵之前接受类别结构的训练。同时基本利率和回报操纵测试的假设，基本利率信息和回报信息是独立的组合。观察者发现：（a）在基本利率和收益估计中存在较小的次优性;（B）在基本利率和收益条件之间没有质的差异;（c）支持基本利率和收益信息独立结合的假设。目前的基本利率和回报学习理论的影响进行了讨论。
The optimality of multidimensional perceptual categorization performance with unequal base rates and payoffs was examined. In Experiment 1, observers learned simultaneously the category structures and base rates or payoffs. Observers showed conservative cutoff placement when payoffs were unequal and extreme cutoff placement when base rates were unequal. In Experiment 2, observers were trained on the category structures before the base-rate or payoff manipulation. Simultaneous base-rate and payoff manipulations tested the hypothesis that base-rate information and payoff information are combined independently. Observers showed (a) small suboptimalities in base-rate and payoff estimation, (b) no qualitative differences across base-rate and payoff conditions, and (c) support for the hypothesis that base-rate and payoff information is combined independently. Implications for current theories of base-rate and payoff learning are discussed.