之前的概率线索会偏向感官编码,随着任务暴露的增加,任务暴露的增加
Kevin Walsh1, David P McGovern2, Jessica Dully3
1School of Psychological Sciences, Monash University, Melbourne, Australia.
eLife
|April 2, 2024
概括
预先的知识通过调整证据标准和改变感官证据编码来偏见感知决策. 这项研究揭示了预期如何影响战略调整和感官处理.
科学领域:
- 认知神经科学 认知神经科学
- 计算神经科学是一种神经科学.
- 人类的感知 人类的感知
背景情况:
- 预先的知识会影响感知决策,导致反应时间和准确度的偏差.
- 传统模型将这些偏差归因于战略标准的调整,如起点的转移.
- 新出现的证据表明,期望也可能直接影响感官证据编码.
研究的目的:
- 为了调查概率线索是否调节传感证据编码超出战略标准调整.
- 为了区分标准调整与感官编码偏差的神经相关性.
- 通过任务曝光来检查这些效应的时间动态.
主要方法:
- 电脑电图 (EEG) 在对比差异检测任务中进行记录.
- 使用有效,无效和中立的概率线索.
- 通过稳定状态视觉唤起潜能 (SSVEP) 编码感官证据的测量.
- 通过运动皮层的mu-β频段活动评估标准调整.
主要成果:
- 概率线索引发了显著的运动准备偏差,与标准调整一致.
- 线索还调节了SSVEP,表明了感官证据编码中的偏差.
- 标准调整很早就出现了,而感官编码效应则随着任务暴露的延长而出现.
结论:
- 概率信息通过战略标准调整和感官证据编码的直接调制来影响感知决策.
- 感官编码偏差随着学习和任务经验而出现.
- 这些发现挑战了纯粹的战略解释,并突出了期望在感知中的双重作用.
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