Tavares Gabriela, Perona Pietro, Rangel Antonio
Computation and Neural Systems, California Institute of TechnologyPasadena, CA, United States.
Division of Humanities and Social Sciences, California Institute of TechnologyPasadena, CA, United States.
Front Neurosci. 2017 Aug 24;11:468. doi: 10.3389/fnins.2017.00468. eCollection 2017.
Perceptual decisions requiring the comparison of spatially distributed stimuli that are fixated sequentially might be influenced by fluctuations in visual attention. We used two psychophysical tasks with human subjects to investigate the extent to which visual attention influences simple perceptual choices, and to test the extent to which the attentional Drift Diffusion Model (aDDM) provides a good computational description of how attention affects the underlying decision processes. We find evidence for sizable attentional choice biases and that the aDDM provides a reasonable quantitative description of the relationship between fluctuations in visual attention, choices and reaction times. We also find that exogenous manipulations of attention induce choice biases consistent with the predictions of the model.
需要对顺序注视的空间分布刺激进行比较的知觉决策可能会受到视觉注意力波动的影响。我们对人类受试者使用了两项心理物理学任务，以研究视觉注意力在多大程度上影响简单的知觉选择，并测试注意力漂移扩散模型（aDDM）在多大程度上能够很好地计算描述注意力如何影响潜在的决策过程。我们发现了明显的注意力选择偏差的证据，并且aDDM对视觉注意力波动、选择和反应时间之间的关系提供了合理的定量描述。我们还发现，对注意力的外部操纵会引发与模型预测一致的选择偏差。
