Czigler István, Winkler István, Pató Lívia, Várnagy Anna, Weisz Júlia, Balázs László
Institute for Psychology of the Hungarian Academy of Sciences, Budapest, Hungary.
Brain Res. 2006 Aug 9;1104(1):129-40. doi: 10.1016/j.brainres.2006.05.034. Epub 2006 Jul 5.
We studied whether, similarly to the auditory modality, short-period temporal integration processes occur in vision. Event-related potentials (ERP) were recorded for occasional stimulus omissions from sequences of patterned visual stimuli. A posterior negative component emerged only when the constant stimulus onset asynchrony (SOA) was shorter than 150 ms. This upper limit is comparable with the duration of the temporal window of integration observed in the auditory modality (including experiments studying the effects of stimulus omissions). Parameters of the posterior negativity were highly similar irrespective of whether the stimuli were task-relevant or not (Experiment 1). Thus, we identified this potential as the visual mismatch negativity (vMMN) component, which reflects task-independent detection of violating regularities of the stimulation. vMMN was followed by an anterior positivity (the P3a), indicating attentional shifts induced by the stimulus omissions. In Experiment 2, a posterior negativity similar to that observed in Experiment 1 emerged after the termination of short trains of stimuli, again only when the SOA was shorter than 150 ms. These results support the notion of a temporal integration window in the visual modality, the duration of which is between 150 and 180 ms.
我们研究了视觉中是否会像听觉模态一样出现短周期时间整合过程。我们记录了与事件相关的电位（ERP），用于对有图案视觉刺激序列中的偶尔刺激遗漏情况进行研究。仅当恒定刺激起始异步（SOA）短于150毫秒时，才会出现一个后部负成分。这个上限与在听觉模态中观察到的时间整合窗口的持续时间相当（包括研究刺激遗漏影响的实验）。无论刺激是否与任务相关，后部负性的参数都高度相似（实验1）。因此，我们将这个电位确定为视觉失配负波（vMMN）成分，它反映了对违反刺激规律的任务独立检测。vMMN之后是一个前部正性波（P3a），表明刺激遗漏引起的注意力转移。在实验2中，在短串刺激终止后，出现了一个与实验1中观察到的类似的后部负性波，同样仅当SOA短于150毫秒时出现。这些结果支持了视觉模态中存在一个时间整合窗口的观点，其持续时间在150到180毫秒之间。
