Imaging Unconscious Semantic Priming — TEI-tagged view

Stanislas Dehaene, Lionel Naccache, Gurvan Le Clec H, Etienne Koechlin, Michael Mueller, Ghislaine Dehaene-Lambertz, Pierre-Francois van de Moortele, Denis Le Bihan · 1998 · neuroscience · doi:10.1038/26967 · full text at the source · TEI xml · tagged edition · index · concepts · authors
Where this record's text came from. faceted 2026-08 by reading the locally held text (pdftext); every evidence string verified as an exact substring of that text before merging. method is coded 'fmri' because the imaging is the paper's headline contribution, but the study is genuinely three-method (behavioural RT, 128-channel ERP/LRP, and event-related fMRI) — the single-value enum cannot express that. Superscript reference markers survive extraction as digits glued to words (e.g. 'masked priming1,2'), and the quotes preserve them verbatim. The paper reports an internal cross-method replication ('Response times recorded during fMRI recording replicated the prime–target congruity effect'), but no external replication, so replication status is untested. The source .txt also contains the start of an unrelated following Nature letter (Lomelí et al.); nothing was quoted from it. 2026-08-19 and 2026-08-25 schema-0.3 passes: every quote verified as an exact substring of the staged text and anchored at merge time; concept terms verified present; every edge endpoint an existing node. Update, 15 September 2026: EXCEPTION, measured with the merge gate's own predicate (Paper.locate): 1 quote(s) on this record are not found as one exact string in the current staged text - content_tags.statistics[2].evidence. The sentence above does not hold for them as written. Where a row records why - the quote is grounded in another copy of the paper, joins two passages with an ellipsis, or differs from the staged text by extraction noise - that note stays on the row.
Some words in these quotes contain the wrong character. The PDF this text was extracted from substituted 33 characters inside a word — a currency sign or a stray accent where a letter pair belongs, as in signi¢cantly for significantly, or a single ligature glyph, as in confidence. They are valid characters in the wrong place, so they survive every encoding check. The quotes keep them for the same reason as above, and a search of this page will not find the affected words.
1 quote on this page was cut from a different copy of this article. This project holds two extractions of this paper: the plain text every other quote here is anchored in, and the publisher’s own HTML edition, which we are not licensed to republish. It is verbatim in the second and cannot be found in the first — not because the tagging is wrong, but because the extraction damaged the passage: a page number dropped into the middle of a number, a formula moved out of its sentence, a ligature where two letters belong. The record names the copy for each one. The quote is the paper’s; the extraction is not.
Other fields define these differently the same word, defined another way in another discipline
false-discovery-rate 6 fields · awareness 3 fields · fmri 2 fields · semantic 2 fields
Tags on this paper every tag the record carries, whether or not the words occur in the text below — a number is how many papers in the corpus carry that tag; a tag with no number is unique to this paper
unconscious priming2 masked priming11 semantic processing prime11 motor cortex3 awareness15 fmri24

Our tag layer for this paper

Priming analysis (Sivroni & Stark meta-disciplinary definition; cited to Sivroni et al. 2023)
Three characteristics: A · association S · secondariness M · modulation
P · primea masked, consciously invisible prime word/number
T · targeta subsequent target requiring a response
B · baselineresponse to an incongruent or neutral prime
E · priming effectfaster congruent responses and measurable brain activation despite the prime being unseen
A · associationcongruent/incongruent
Cross-disciplinary analysis
content-tags & facets: phenomenon · claim-type · cross-domain-transfer · mechanism · claim-relation · replication-status · limitation — grounded in the full text
phenomenonmasked semantic priming of number comparison— “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 priming1,2.”
claim-typeexistence— “A stream of perceptual, semantic and motor processes can therefore occur without awareness.”
method — evidence— “Here we use a combination of behavioural and brain-imaging techniques to estimate the depth of processing of masked numerical primes.”
transferfrom event-related potential electrophysiology: the lateralized readiness potential, an ERP measure of covert motor preparation, rebuilt in the haemodynamic signal and renamed the lateralized BOLD response— “We therefore extracted the fMRI signal profile from the left and right motor cortices, and used it to derive an index of lateralized motor activation analogous to the LRP, the lateralized bold response (LBR; Fig. 5).”transfers[0]
builds-on studies of masked-face modulation of amygdala activity (refs 11, 12: Whalen et al. 1998; Morris, Öhman & Dolan 1998)— “This concurs with the observation of a modulation of amygdala activity by masked visual faces11,12.”claim_relations[0]
builds-on prior imaging of unconscious cerebral processing (refs 13, 14: Berns, Cohen & Mintun 1997; Sahraie et al. 1997)— “As shown previously13,14, brain imaging now has the potential to image unconscious cerebral processing.”claim_relations[1]
senseTHE INVISIBLE PRIME APPLIES THE TASK INSTRUCTIONS, WHICH IS A STRONGER CLAIM THAN SEMANTIC ACTIVATION. `the interference between prime and target can be attributed to a covert, prime-induced activation of motor cortex, a response bias that must be overcome in incongruent trials. This indicates that the prime was unconsciously processed according to task instructions, all the way down to the motor system.` The unseen numeral was compared to 5 and a hand was prepared. Most masked-priming records in this corpus argue about whether MEANING was reached; this one argues that a RULE was executed on something nobody saw— “We then showed that the interference between prime and target can be attributed to a covert, prime-induced activation of motor cortex, a response bias that must be overcome in incongruent trials. This indicates that the prime was unconsciously processed according to task instructions, all the way down to the motor system”senses[0]
senseAND THE CONTROL ANSWERS THE OBJECTION THAT WEAKENED AN EARLIER RESULT IN THIS SAME CORPUS: `the entire response time distribution was shifted by ~24 ms in incongruent trials compared with congruent trials. Thus, there was no evidence that the effect was found in only A small proportion of subjects or A small number of trials with a distinct distribution of response times.` buchner2003 - tagged three records ago - reports that Driver & Baylis's cross-modal effect `was observed only for a small subgroup of 14 (out of 24) participants`, which `leaves some uncertainty as to the reality` of it. This paper pre-empts exactly that, with a distributional argument rather than an average, and reports that all 12 subjects showed the effect— “Furthermore, the entire response time distribution was shifted by ,24 ms in incongruent trials compared with congruent trials. Thus, there was no evidence that the effect was found in only a small proportion of subjects or a small number of trials with a distinct distribution of response times”senses[1]
senseTHE WHOLE PROCESSING CHAIN IS PLACED OUTSIDE AWARENESS IN ONE SENTENCE: `A stream of perceptual, semantic and motor processes can therefore occur without awareness.` Three stages, named in order, and the claim is that none of them requires consciousness. That is the sentence the rest of this corpus's masked-priming records are arguing with - Holcomb2005 asks whether the N400 stage is automatic, Huang2018 restricts affective primacy to face stimuli, Kouider2008 asks about levels of processing. Here all three levels are claimed at once, from a single 43 ms numeral— “A stream of perceptual, semantic and motor processes can therefore occur without awareness”senses[2]
controlthe number-comparison task performed twice by every subject, in counterbalanced order — held — rules out an order effect between the two runs, and between-subject differences, at once - each subject does both and the order is balanced across them— “Subjects performed the number-comparison task twice in counterbalanced order.”controls[0]
effect directionprime —causes→ motor cortex — increases— “We then showed that the interference between prime and target can be attributed to a covert, prime-induced activation of motor cortex, a response bias that must be overcome in incongruent trials”concept_edges[0]
noteprime —causes→ motor cortex — THE PAPER'S CENTRAL CLAIM AND ITS MOST SURPRISING ONE: an unreportable stimulus produces measurable motor activation. 'covert' and 'can be attributed to' are both in the quote - the motor activation is measured, and its attribution to the prime is the inference. Weight 0.9 rather than 0.95 for that second half.concept_edges[0]
weightprime —causes→ motor cortex — 0.9
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concept_edges[0]
outcome (stated by the tagger, no quotation)control — heldcontrols[0]
evidence status notesense — the staged text carries a COMPARISON/APPROXIMATION OPERATOR REPLACED BY PUNCTUATION: the paper's “~24 ms” is staged as “,24 ms”. Not a spurious space and not a reversal - the character is REPLACED and the result is still grammatical, so it reads as a stray comma rather than as damage. Settled from the paper's own preceding sentence, which gives “average 24 ms, s.d. 13.5 ms”, and the same paragraph carries “(P , 0:0001)” for “P < 0.0001”. The tag's own label already reads “~24 ms”, so the reading was right and only the evidence is damaged; the quote is verbatim against the staged text and no re-slice avoids the character.
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
senses[1]
replicationuntested
limitationERP localisation of the covert priming effect is spatially imprecise, which is why fMRI was added
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
limitations[0]
limitationThe haemodynamic measure is too coarse to resolve the small activation delays produced by masked priming
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
limitations[1]
Content tags
content-observations: finding · quantity · variable · definition · key-term — grounded in the full text
findingthe unseen prime modulates brain activation and congruent responses
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.findings[1]
key-termsmasked priming, unconscious, semantic, activation, congruent, prime, motor
Concepts
terms this paper carries, each with the sentence it was cut from — the layer that joins one paper to another. Terms with no quote yet are on CONCEPTS.html.
conceptprime — not defined in this paper's own words; a numeral flashed for 43 ms between two masks, which subjects could neither report nor tell from a nonsense string - and which is nevertheless compared to 5 and used to prepare a hand
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concepts[3]
conceptmotor cortex — not defined in this paper's own words; THE DEPTH THE CLAIM REACHES. The prime does not merely activate a meaning - it produces a measurable response bias in motor cortex that the correct answer must then overcome
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concepts[4]
conceptawareness — not defined in this paper's own words; what is absent, and the paper's summary sentence puts the whole processing chain outside it: perception, meaning and action, none of them requiring it
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
concepts[5]
Statistics — cross-field join keys
field-invariant statistical terms, used in their statistical sense (gated on a number / symbol / test). A p-value or a standard deviation means the SAME thing in physics, biology, psychology and sociology — so these are the strongest cross-field join keys. Grounded verbatim.
effect-size d
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[0]
evidence status noteeffect-size — THE MATHS LAYER OF THE STAGED TEXT WAS MOJIBAKE AND HAS BEEN REPAIRED. This paper's extraction rendered '=' as U+00BC (the vulgar fraction one quarter) and '+' as U+00FE (thorn), so the quote read 'p ¼ 0.01' where the paper says 'p = 0.01'. It passed every check we own, because the staged text said the same wrong thing: the offsets were right and the recorded hash of the staged text matched. Repaired only where the character stands in an operator's place - spaced, with a number after it - because the same U+00BC is a REAL QUARTER in six other papers ('a ¼ inch condenser microphone'). Original in evidence as extracted, pre-repair file in an internal file. QUOTE RECOVERED FROM THE PAPER'S OWN CHARACTERS. The recorded quote was LETTERS-ONLY IDENTICAL to this stretch of the staged text but not an exact substring of it - spaces, hyphens, ligature glyphs or mathematical operators differed, so it could never anchor. This is the file's own text between the same two letters: not produced by a rule about the damage, copied out of the file. Round-trip checked (the recovered span is letters-only equal to the original) and length-checked. The text as originally recorded is kept in evidence as extracted. Correction, 18 September 2026: only '=' and '+' were repaired. In this quote the ':' in 'P = 0:0027' is a decimal point (P = 0.0027) and still prints wrongly.content_tags.statistics[0]
false-discovery-rate FDR as written: multiple comparisons
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[1]
evidence status notefalse-discovery-rate — QUOTE REPAIRED: the extractor split a unicode and the quote was recorded faithfully with the damage in it, which made it unanchorable. The repaired string is an EXACT SUBSTRING of the staged text - that is why it was accepted, not because a rule produced it. The text as originally recorded is kept in evidence as extracted.content_tags.statistics[1]
mean μ as written: average of
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[2]
not machine-vouchedmean — not-in-our-copy - The quote is in the original web page we fetched for this paper, but not in the text we tag against, which was extracted differently. Checked with ligatures, hyphens, spacing and punctuation set aside.content_tags.statistics[2]
t-test t as written: t-tests
Quotation withheld — this paper is not ours to reproduce, and the page has already quoted as much of it as the rights layer allows. The tag, its field and its confidence stand; the sentence is at the publisher.
content_tags.statistics[3]
evidence status notet-test — QUOTE REPAIRED: the extractor split a all and the quote was recorded faithfully with the damage in it, which made it unanchorable. The repaired string is an EXACT SUBSTRING of the staged text - that is why it was accepted, not because a rule produced it. The text as originally recorded is kept in evidence as extracted.content_tags.statistics[3]

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