感知和决策不确定性对定向感知中的序列依赖性的影响
Zoë Little1,2, Colin W G Clifford3
1School of Psychology, University of New South Wales, Sydney, NSW, Australia. z.little@unsw.edu.au.
Attention, perception & psychophysics
|March 3, 2025
概括
视觉感知中的连续依赖不受先前刺激中的不确定性影响. 相反,当当前刺激具有较低的信号对噪声,较低的证据或较低的信心时,它是最强的,这表明它不会偏向过去的决定.
科学领域:
- 认知心理学 认知心理学
- 神经科学是一个神经科学.
- 视觉感知 视觉感知 视觉感知
背景情况:
- 序列依赖描述了当前感知反应对最近刺激的偏差.
- 这种现象被认为可以增强信号噪声比,但是由目标刺激的不确定性调节的.
- 以前的研究表明,诱导刺激的不确定性不会影响序列依赖.
研究的目的:
- 调查关于前一个刺激 (诱导因素) 决策中的不确定性是否会调节连续依赖.
- 在诱导试验中区分刺激不确定性和决策不确定性.
- 探索主观信心和连续依赖之间的关系.
主要方法:
- 参与者 (N=33) 观看了不同信号噪声比率和积极证据水平的加博尔补丁.
- 记录了对答案的定向和主观信心.
- 刺激被操纵以匹配信号与噪声比,同时改变对比度,影响信心,但不影响准确性.
主要成果:
- 对于信号与噪声比较低,积极证据较低,报告信心较低的刺激,连续依赖性最大.
- 在诱导试验中,基于任何类型的不确定性,没有观察到序列依赖的调制.
- 主观信心,而不是刺激的不确定性,与连续依赖的强度相关.
结论:
- 连续依赖不是由诱导刺激或决策不确定性调节的.
- 研究结果表明,序列依赖可能并不代表对先前决策的偏见.
- 这挑战了视觉感知中的串行依赖现有的理论框架.
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