Utrecht University, Department of Experimental Psychology, Helmholtz Institute, Heidelberglaan 2, 3584 CS Utrecht, The Netherlands.
Conscious Cogn. 2011 Dec;20(4):1193-200. doi: 10.1016/j.concog.2011.03.017. Epub 2011 May 4.
Recent research on grapheme-colour synesthesia has focused on whether visual attention is necessary to induce a synesthetic percept. The current study investigated the influence of synesthesia on overt visual attention during an oculomotor target selection task. Chromatic and achromatic stimuli were presented with one target among distractors (e.g. a '2' (target) among multiple '5's (distractors)). Participants executed an eye movement to the target. Synesthetes and controls showed a comparable target selection performance across conditions and a 'pop-out effect' was only seen in the chromatic condition. As a pop-out effect was absent for the synesthetes in the achromatic condition, a synesthetic element appears not to elicit a synesthetic colour, even when it is the target. The synesthetic percepts are not pre-attentively available to distinguish the synesthetic target from synesthetic distractors when elements are presented in the periphery. Synesthesia appears to require full recognition to bind form and colour.
近年来，关于图形-颜色联觉的研究主要集中在视觉注意力是否有必要引起联觉感知。本研究在眼动目标选择任务中调查了联觉对显性视觉注意力的影响。在呈现刺激时，其中一个目标（例如多个“5”中的“2”）被视为目标，其他的则是干扰项（例如多个“5”）。参与者需要执行眼动来指向目标。在不同条件下，联觉者和对照组的目标选择表现相当，并且仅在彩色条件下才出现“突显效应”。由于在无色条件下联觉者没有出现突显效应，即使目标是联觉元素，也不会引起联觉颜色。当元素出现在外围时，联觉感知无法预先注意到以将联觉目标与联觉干扰项区分开来。联觉似乎需要完全识别才能将形式和颜色结合起来。
