Wascher E, Wauschkuhn B, Verleger R
Abteilung für Klinische und Physiologische Psychologie, Eberhard-Karls-Universität Tübingen.
Z Exp Psychol. 1997;44(1):82-102.
The lateralized readiness potential as a measure of response tendencies has become a relevant method in experimental psychology within the last decade. This measure delivers information about response preparation long before the overt response. Applying the method of measuring event-related lateralizations (ERL) of the EEG to posterior sites, correlates of processing of spatial information and of response selection have been found. The present study investigated the topographical distribution of asymmetries at the moment of response selection. Response selection was assumed to be reflected in a discrete peak of parietal asymmetries. At this time point two distinct topographies were found that might reflect two different types of information processing. If response selection was based on spatial information a parieto-occipital maximum was found. In contrast, if centrally presented symbolic stimuli were used for response selection, lateralizations were largest at central (motor areas) and at parietal sites.
在过去十年中，作为一种反应倾向测量指标的偏侧化准备电位已成为实验心理学中的一种相关方法。这种测量方法能在明显反应之前很久就提供有关反应准备的信息。将脑电图（EEG）的事件相关偏侧化（ERL）测量方法应用于后脑部区域，发现了空间信息处理和反应选择的相关指标。本研究调查了反应选择时刻不对称性的地形分布。反应选择被认为反映在顶叶不对称性的一个离散峰值中。在这个时间点发现了两种不同的地形，它们可能反映了两种不同类型的信息处理。如果反应选择基于空间信息，则发现顶枕部不对称性最大。相反，如果使用中央呈现的符号刺激进行反应选择，则在中央（运动区）和顶叶部位的偏侧化最大。
