Poster Session: A unifying framework for perceptual decision-making.
Poster Session: A unifying framework for perceptual decision-making.
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海报会议：感知决策的统一框架。
DOI：
10.1167/jov.23.11.59
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发表时间：
2023
影响因子：
1.8
通讯作者：
Tadin,Duje
中科院分区：
文献类型：
--
作者：
Lin,Ying;Chen,Zhen;Reynoso,Jose;Haefner,Ralf;Tadin,Duje
知觉决策（PDM）的研究有两种方法。阈值测量主要用于心理物理学，而反应时间（RT）与相关模型已被用于估计PDM的组成部分（即漂移率）。为了测试这两种方法是否反映了重叠机制，我们进行了3个实验：运动、静态定向和动态定向任务。DT是足以做出准确知觉决策的最短刺激呈现时间。用漂移扩散模型（DDM）拟合RTs和选择。在运动任务中，我们发现经验dt与DDM预测的dt之间存在密切的关系。令人惊讶的是，在静态任务中，两者之间几乎没有相关性；随着对比度的提高，DTs单调改善，但漂移率饱和在6%。我们假设这种不匹配是由于静态任务中立即可用的信息，而不需要积累新的证据。因此，我们开发了一种新的动态定向任务，它模仿了运动任务的动态特性，并发现了dt和漂移率之间的类似关系。总之，我们展示了两个动态任务的dt和漂移率之间的密切联系。这一结果支持将漂移率作为感知灵敏度的代理的概念化，但仅适用于随着时间的推移可以获得新信息的任务。
Perceptual decision making (PDM) has been studied using two approaches. Threshold measurement is predominant used in psychophysics, while reaction times (RT) with associated models have been used to estimate components of PDM (ie, drift rate). To test if these two approaches reflect overlapping mechanisms, we conducted 3 experiments: a motion, a static orientation, and a dynamic orientation task. DT is the shortest stimulus presentation time sufficient to make accurate perceptual decisions. RTs and choices were fitted by a drift diffusion model (DDM). We expected a close relationship between DTs and drift rates, allowing us to accurately predict DTs from RT. In the motion task, we found a close relation between the empirical DTs and the DTs predicted by the DDM. Surprisingly, in the static task, there was little correlation between the two; DTs, improved monotonically with higher contrast, but drift rates saturated at 6%. We hypothesize that this mismatch is due to the information being available immediately in the static task, without needing to accumulate new evidence. Thus, we developed a novel dynamic orientation task that mimics the dynamic nature of the motion task and found a similar relation between DTs and drift rates. In summary, we show a close link between DTs and drift rate for the two dynamic tasks. This result supports the conceptualization of drift rate as a proxy for perceptual sensitivity but only for task where new information becomes available over time.