Luck S J, Hillyard S A
Department of Neurosciences, University of California, San Diego, La Jolla 92093-0608.
Percept Psychophys. 1990 Dec;48(6):603-17. doi: 10.3758/bf03211606.
Event-related potentials were recorded from young adults during a visual search task in order to evaluate parallel and serial models of visual processing in the context of Treisman's feature integration theory. Parallel and serial search strategies were produced by the use of feature-present and feature-absent targets, respectively. In the feature-absent condition, the slopes of the functions relating reaction time and latency of the P3 component to set size were essentially identical, indicating that the longer reaction times observed for larger set sizes can be accounted for solely by changes in stimulus identification and classification time, rather than changes in post-perceptual processing stages. In addition, the amplitude of the P3 wave on target-present trials in this condition increased with set size and was greater when the preceding trial contained a target, whereas P3 activity was minimal on target-absent trials. These effects are consistent with the serial self-terminating search model and appear to contradict parallel processing accounts of attention-demanding visual search performance, at least for a subset of search paradigms. Differences in ERP scalp distributions further suggested that different physiological processes are utilized for the detection of feature presence and absence.
在一项视觉搜索任务中，对年轻人记录事件相关电位，以便在特雷斯曼的特征整合理论背景下评估视觉处理的并行和串行模型。并行和串行搜索策略分别通过使用具有特征和不具有特征的目标来产生。在无特征条件下，将反应时间和P3成分潜伏期与刺激集大小相关的函数斜率基本相同，这表明对于较大刺激集大小观察到的较长反应时间可以仅由刺激识别和分类时间的变化来解释，而不是由知觉后处理阶段的变化来解释。此外，在这种条件下目标出现试验中P3波的振幅随刺激集大小增加，并且当前一个试验包含目标时更大，而在无目标试验中P3活动最小。这些效应与串行自终止搜索模型一致，并且似乎与需要注意力的视觉搜索表现的并行处理解释相矛盾，至少对于一部分搜索范式是这样。ERP头皮分布的差异进一步表明，检测特征存在和不存在利用了不同的生理过程。
