The neural correlates of consciousness: new experimental approaches needed?

Hohwy · Consciousness and Cognition · 2009 · philosophy · 10.1016/j.concog.2009.02.006 · record hohwy2009-the-neural-correlates-of-conscious
tag layer · index · concepts · authors · עברית
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. Philosophy of neuroscience, no data of its own: 'method' is set to conceptual-analysis because nothing on the suggested list fits — 'review' would misdescribe an argument, and the paper itself calls its stance 'the point of view of philosophy of science'. The two claim relations are both to Searle and deliberately point opposite ways: the paper endorses and develops his objection to the content-based approach and rejects his conclusion that the state-based approach should replace it. Its parallel engagement with Koch, Baars, Bayne and Block is real but is either description of their positions or terminological, not an explicit self-relation, so it is not recorded. Replication status is untested because the paper reports no empirical test. 2026-08-14 and 2026-08-15 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 - concept_edges[1].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. Update, 16 September 2026: EXCEPTION TO THE DATED PASS ABOVE, on this record only: this record carries 1 composite quote field - a quote assembled from two or more passages joined by an ellipsis. A COMPOSITE IS NOT AN EXACT CONTIGUOUS SUBSTRING of the staged text and is deliberately not anchored: each of its parts is verified separately at the offsets in evidence composite spans, and a part occurring more than once carries span null rather than a guessed offset. So the 'every quote verified as an exact substring' clause of the dated pass above DOES NOT HOLD for those fields, and never did - the parts were verified, the whole was not. Nothing is deleted, re-grounded or withdrawn: this writes down an exception that was always true of composites and had not been recorded, so a reader was told more than the pass had checked.
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Other fields define these differently the same word, defined another way in another discipline
neural correlates of consciousness 2 fields

Tags on this paper

Every tag the record carries, each linking to every other paper in the corpus that carries it. A tag appears here whether or not its words occur in the article — the spans below are only the ones a sentence in this paper licenses. Of the 5 concept tags on this paper, all 5 are grounded in a quoted sentence.
neural correlates of consciousness content consciousness state consciousness unified conscious field binocular rivalry Relegating state consciousness to a background condition screens off any contribution the state NCC makes to constituting a content's being conscious, so the design can only speak to which content is represented The pre-existing conscious state, not the induced content, may be the actual difference-maker that renders the content conscious NCC for content consciousness NCC for states of consciousness total NCC neural correlates of volition conceptual-analysis

Legend

relation to other workclaim_relationshow this paper stands to another: agrees, contradicts, extends, qualifies
claim typeclaim_typethe shape of the claim: existence, mechanism, method, critique, prediction, null
concept edgeconcept_edgesan asserted relation between two concepts, with the sentence asserting it
conceptconceptsan idea the paper works with, quoted where the paper uses it
content tagcontent_tagsa finding, definition, quantity, statistic or variable named in the paper
limitationlimitationswhat the paper says its evidence cannot support
mechanismmechanismshow the reported effect is said to come about
methodmethodhow the paper produced its evidence
phenomenonphenomenonthe effect or regularity under study
sensesensesa distinct use of a term, quoted where the paper fixes it

The paper

The full text is not reproduced here. This article is not cleared for redistribution, so the page carries the tag layer only. Its evidence sentences are withheld; the grounding status remains with each tag, and the article itself is at https://doi.org/10.1016/j.concog.2009.02.006. The reading view exists for the papers whose licence permits it.

Every tag on this page

claim_relations 2 · claim_type 1 · concept_edges 1 · concepts 5 · content_tags 12 · limitations 7 · mechanisms 2 · method 1 · phenomenon 1 · senses 4

Relations on this page carry a quotation for the claim. Where a relation was separately evidenced — and so tested against the vocabulary for its type — the row says so; none of 1 relation here carry that mark. The rest are the tagger’s reading of the sentence quoted beside them.

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facettagfieldconf.whose words
claim_typecritique
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claim_typethe paper's words
phenomenonneural correlates of consciousness
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phenomenonthe paper's words
methodconceptual-analysis
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methodthe paper's words
mechanismsmechanisms
Quotation withheld — this record is not cleared for redistribution. The sentence is in the paper at the link above.
mechanisms[0]the tagger's words
mechanismsmechanisms
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mechanisms[1]the tagger's words
limitationsThe argument shows the current paradigms need re-development, not that no NCC can ever be found.
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limitations[0]the tagger's words
limitationsThe paper is neutral between theories of consciousness and does not adjudicate them.
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limitations[1]the tagger's words
limitationsThe design is argued to be flawed in the way a carcinogen study would be if every mouse already had the cancer: the property of interest is presupposed in every subject.
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what this limits: a content-NCC result as evidence about what makes a content conscious: the design presupposes the property whose instantiation is at issue, exactly as a carcinogen study would if the property were already instantiated in all the mice
limitations[2]1.0the tagger's words
limitationsOn the author's own account the approach can at best deliver the conditions for a content being SELECTED for consciousness, which is a different question from a content being conscious.
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what this limits: the content-based NCC literature: at best it finds the minimally sufficient conditions for selection into consciousness, not for a content's being conscious
limitations[3]1.0the tagger's words
limitationsTightening the experimental control defeats the aim: the better the content is matched, the harder the conscious/unconscious contrast is to sustain.
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what this limits: a state-based design that matches content across conditions: the better the matching, the harder it becomes to uphold the very contrast the approach depends on
limitations[4]1.0the tagger's words
limitationsThe field states that absence of the neural marker cannot be read as absence of the phenomenon.
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what this limits: a negative NCC finding in a patient: the researchers are explicit that absent thalamocortical or SMA activity
limitations[5]1.0the tagger's words
limitationsA CONTROL GROUP ARGUED AWAY RATHER THAN OMITTED. Owen's case that the vegetative-state patient's sustained SMA response is voluntary rests on its duration and on its changing to order - and the author notes that this logic, if it works, makes a control group unnecessary, since ANY brain activity time-locked to the requests would show the same thing. He calls that consequence puzzling rather than wrong.
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limitations[6]0.9the tagger's words
conceptsneural correlates of consciousness
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concepts[0]the paper's words
conceptscontent consciousness
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concepts[1]the paper's words
conceptsstate consciousness
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concepts[2]the paper's words
conceptsunified conscious field
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concepts[3]the paper's words
conceptsbinocular rivalry
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concepts[4]the paper's words
sensesNCC - FOR CONTENT CONSCIOUSNESS: the minimally sufficient neural conditions for a specific, mostly representational content being conscious rather than not being conscious
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senses[0]1.0the tagger's words
sensesNCC - FOR STATES OF CONSCIOUSNESS: the minimally sufficient conditions for a creature being in an overall conscious state rather than an overall unconscious state - a different contrast, and the paper's whole argument is that the two cannot stand in for each other
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senses[1]1.0the tagger's words
sensesstate consciousness - A TERM WHOSE SENSE THE AUTHOR CANNOT STATE SUCCINCTLY, and he gives that failure as the core motivation for writing the paper
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senses[2]1.0the tagger's words
sensesthe field's vocabulary - DECLARED NON-UNIFORM by the author, who then proceeds on the clustering of studies rather than on the terms
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senses[3]1.0the tagger's words
claim_relationsextends → Searle (2005) on the content-based NCC approach
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claim_relations[0]the tagger's words
claim_relationscontradicts → Searle (2005) on adopting the state-based approach instead
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claim_relations[1]the tagger's words
concept_edgesunified conscious field —same-as→ state consciousness
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strength of the relation: 1 Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but Searle's notion is 'supposedly close' to state consciousness, and the author rejects Searle's use; attributed.
concept_edges[0]the tagger's words
content_tagsBecause content-based NCC studies hold the subject's overall conscious state fixed rather than manipulating it, that presupposed conscious state remains an uncontrolled potential cause of the content's being conscious, i.e. a confound.
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content_tags.findings[0]the tagger's words
content_tagsThe content-based approach's target is the neural correlate of a content being selected for conscious presentation, assuming an overall conscious state.
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content_tags.findings[1]the tagger's words
content_tagsResearchers can stay neutral about whether the creature is conscious and still gain fruitful results with this method.
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content_tags.findings[2]the tagger's words
content_tagsIn state-based studies there is a trade-off: the more carefully conscious content is matched across conditions, the weaker the grounds for believing the two conditions still differ in being conscious versus unconscious rather than being two conscious conditions.
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content_tags.findings[3]the tagger's words
content_tagsOn this criterion the mark of consciousness becomes voluntary control rather than phenomenality.
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content_tags.findings[4]the tagger's words
content_tagsThe alternative route of inferring state consciousness from the presence of a content NCC also fails, because the content-based approach already assumes the subject is in a conscious state and therefore cannot independently establish it.
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content_tags.findings[5]the tagger's words
content_tagsThe paper concludes that neither the content-based nor the state-based paradigm, pursued on its own, can deliver the neural correlates of consciousness.
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content_tags.findings[6]the tagger's words
content_tagsThe remedy proposed is not to conjoin the two approaches' results but to build a new paradigm that targets the causal, mechanistic interplay between content processing and overall conscious state across contents and across conscious and unconscious state types.
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content_tags.findings[7]the tagger's words
content_tagsNCC for content consciousness
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content_tags.definitions[0]the tagger's words
content_tagsNCC for states of consciousness
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content_tags.definitions[1]the tagger's words
content_tagstotal NCC
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also in: total NCC
content_tags.definitions[3]the tagger's words
content_tagsneural correlates of volition
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content_tags.definitions[4]the tagger's words

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