Multisensory processing of redundant information in go/no-go and choice responses
Multisensory processing of redundant information in go/no-go and choice responses
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DOI：
10.3758/s13414-014-0644-0
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发表时间：
2014-05-01
影响因子：
1.7
通讯作者：
Gondan, Matthias
中科院分区：
文献类型：
--
作者：
Blurton, Steven P.;Greenlee, Mark W.;Gondan, Matthias
在多感官研究中，与单模态目标呈现相比，当呈现多模态刺激时，通常会观察到更快的反应。这种所谓的冗余信号效应可以通过多种框架来解释，包括单独激活和共激活模型。大量研究已经研究了冗余信号效应；然而，大多数研究仅限于拒绝单独激活模型。只有少数研究对共激活模型进行了分析，主要使用简单的响应任务。在这里，我们研究了进行/不进行以及对冗余听觉-视觉刺激的选择反应背后的多感觉整合机制。在本研究中，响应时间的均值和方差，以及进行/不进行和选择响应的准确率，被用来测试基于两个吸收屏障内扩散过程的线性叠加的共激活模型（Schwarz，1994）。扩散叠加模型准确地描述了响应时间的均值和方差以及在两个任务中观察到的正确响应的比例。因此，线性叠加似乎是整合不同感觉通道提供的冗余信息的一般原理，并且不限于简单的响应。结果将现有的多感官整合理论与选择行为理论联系起来。
In multisensory research, faster responses are commonly observed when multimodal stimuli are presented, as compared to unimodal target presentations. This so-called redundant-signals effect can be explained by several frameworks, including separate-activation and coactivation models. The redundant-signals effect has been investigated in a large number of studies; however, most of those studies have been limited to the rejection of separate-activation models. Coactivation models have been analyzed in only a few studies, primarily using simple response tasks. Here, we investigated the mechanism of multisensory integration underlying go/no-go and choice responses to redundant auditory-visual stimuli. In the present study, the mean and variance of response times, as well as the accuracy rates of go/no-go and choice responses, were used to test a coactivation model based on the linear superposition of diffusion processes (Schwarz, 1994) within two absorbing barriers. The diffusion superposition model accurately describes the means and variances of response times as well as the proportions of correct responses observed in the two tasks. Linear superposition thus seems to be a general principle in the integration of redundant information provided by different sensory channels, and is not restricted to simple responses. The results connect existing theories of multisensory integration with theories on choice behavior.