Imaging unconscious semantic priming - PubMed (original) (raw)
. 1998 Oct 8;395(6702):597-600.
doi: 10.1038/26967.
Affiliations
- PMID: 9783584
- DOI: 10.1038/26967
Imaging unconscious semantic priming
S Dehaene et al. Nature. 1998.
Abstract
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. It has been debated whether masked primes can activate cognitive processes without gaining access to consciousness. 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.
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