de Wit Matthieu M, Masters R S W, van der Kamp John
Institute of Human Performance, University of Hong Kong, Hong Kong SAR, China.
Motor Control. 2012 Jan;16(1):120-8. doi: 10.1123/mcj.16.1.120.
Based upon evidence that vision for action has quicker access to visual information than vision for perception, we hypothesized that the two systems may have differentiated visual thresholds. There is also evidence that, unlike vision for perception, vision for action is insensitive to cognitive dual-task interference. Using visual masking, we determined the visual thresholds of 15 participants in a perception task, an action task and an action plus concurrent cognitive secondary task. There was no difference in threshold between the perception task and the action task, but the action plus concurrent secondary task was accompanied by a greater visual threshold than both the perception task and the action task alone, indicating dual-task interference. The action task was thus most likely informed by vision for perception. The implications of these results are reviewed in the context of recent discussions of the two visual systems model.
基于行动视觉比知觉视觉能更快获取视觉信息的证据，我们推测这两个系统可能有不同的视觉阈值。也有证据表明，与知觉视觉不同，行动视觉对认知双任务干扰不敏感。我们使用视觉掩蔽，确定了15名参与者在知觉任务、行动任务以及行动加并发认知次级任务中的视觉阈值。知觉任务和行动任务的阈值没有差异，但行动加并发次级任务的视觉阈值比单独的知觉任务和行动任务都要高，表明存在双任务干扰。因此，行动任务最有可能是由知觉视觉提供信息的。在最近关于双视觉系统模型的讨论背景下，对这些结果的意义进行了综述。
