Imaging unconscious semantic priming
Imaging unconscious semantic priming
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DOI：
10.1038/26967
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发表时间：
1998-10-08
期刊：
影响因子：
64.8
通讯作者：
Le Bihan, D
中科院分区：
文献类型：
--
作者：
Dehaene, S;Naccache, L;Le Bihan, D
然而，被掩盖和呈现得如此短暂以至于无法被看到的视觉单词可能会促进相关单词的后续处理，这种现象称为“掩蔽启动”(masked priming)(1,2)。蒙面素数是否可以在不获得意识的情况下激活认知过程一直存在争议(3-5)。在这里，我们结合使用行为和大脑成像技术来估计掩码数字素数的处理深度。我们的结果表明，蒙面刺激对大脑活动的电学和血流动力学测量有可测量的影响，当受试者与清晰可见的目标数字进行明显的语义比较任务时，隐性运动活动的测量表明他们也无意识地将任务指令应用于看不见的蒙面数字。因此，一系列感知、语义和运动过程可以在无意识的情况下发生。
Visual words that are masked and presented so briefly that they cannot be seen may nevertheless facilitate the subsequent processing of related words, a phenomenon called masked priming(1,2). It has been debated whether masked primes can activate cognitive processes without gaining access to consciousness(3-5). Here we use a combination of behavioural and brain-imaging techniques to estimate the depth of processing of masked numerical primes. Our results indicate that masked stimuli have a measurable influence on electrical and haemodynamic measures of brain activity, When subjects engage in an overt semantic comparison task with a clearly visible target numeral, measures of covert motor activity indicate that they also unconsciously apply the task instructions to an unseen masked numeral. A stream of perceptual, semantic and motor processes can therefore occur without awareness.