Focused attention vs. crossmodal signals paradigm: deriving predictions from the time-window-of-integration model.
Focused attention vs. crossmodal signals paradigm: deriving predictions from the time-window-of-integration model.
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DOI：
10.3389/fnint.2012.00062
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发表时间：
2012
影响因子：
3.5
通讯作者：
Diederich A
中科院分区：
文献类型：
--
作者：
Colonius H;Diederich A
在跨模态信号范例（CSP）中，参与者被指示对来自不同模态的一组刺激做出反应，这些刺激或多或少同时呈现，只要检测到来自任何模态的刺激。另一方面，在集中注意范式（FAP）中，只应对来自预定义的目标模态的刺激做出反应，而应忽略来自非目标模态的刺激。无论应用哪种范式，一个典型的结果是，对跨通道刺激的反应往往比对单通道刺激的反应更快，这种现象通常被称为“跨通道相互作用”。在这里，我们调查的时间窗口的集成（TWIN）建模框架的预测，以前提出的作者。结果表明，TWIN作出具体的定性和定量预测两种范式如何不同方面的概率多感觉集成和响应增强的量，包括刺激强度的影响（“逆有效性”）。介绍一个决策理论框架，TWIN进一步允许比较两个范例相对于预测的最佳时间窗口大小和它的依赖性的先验概率的跨模态刺激信息是指相同的事件。为了检验这些预测，系统地比较跨模态效应的刺激条件下，除了CSP-FAP指令的实验研究应该在未来进行。
In the crossmodal signals paradigm (CSP) participants are instructed to respond to a set of stimuli from different modalities, presented more or less simultaneously, as soon as a stimulus from any modality has been detected. In the focused attention paradigm (FAP), on the other hand, responses should only be made to a stimulus from a pre-defined target modality and stimuli from non-target modalities should be ignored. Whichever paradigm is being applied, a typical result is that responses tend to be faster to crossmodal stimuli than to unimodal stimuli, a phenomenon often referred to as “crossmodal interaction.” Here, we investigate predictions of the time-window-of-integration (TWIN) modeling framework previously proposed by the authors. It is shown that TWIN makes specific qualitative and quantitative predictions on how the two paradigms differ with respect to the probability of multisensory integration and the amount of response enhancement, including the effect of stimulus intensity (“inverse effectiveness”). Introducing a decision-theoretic framework for TWIN further allows comparing the two paradigms with respect to the predicted optimal time window size and its dependence on the prior probability that the crossmodal stimulus information refers to the same event. In order to test these predictions, experimental studies that systematically compare crossmodal effects under stimulus conditions that are identical except for the CSP-FAP instruction should be performed in the future.