Masking Interrupts Figure-Ground Signals in V1

Lamme, Zipser, Spekreijse · Journal of Cognitive Neuroscience · 2002 · neuroscience · 10.1162/089892902320474490 · record lamme2002-masking-interrupts-figure-ground-s
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. Extraction is clean apart from degree signs and micro symbols being mangled (45 deg reads as '458', 135 deg as '1358', micrometres as 'mm'); the quoted limitation about 'only two orientations, fixed at 458 and 1358' is reproduced exactly as extracted, mangling included. Both claim relations are self-relations to the authors' own earlier papers - the paper uses 'corroborates' and 'confirms', which I mapped to 'replicates'; no relation to independent groups is stated in the paper's own voice, so none is recorded. The paper also reports a null result inside the main mechanism claim (no trial-by-trial link between modulation size and the monkey's report, 'data not shown'), but since that is a subsidiary analysis rather than the shape of the contribution, claim type stays 'mechanism'. Both figure–ground and target–mask are written with a spaced en dash in the source; quotes preserve it. Replication status is 'untested' because no external confirmation of this specific masking result is claimed in the text. 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.
How to read this page. The article itself is not reproduced here — this paper is not cleared for redistribution, so what follows is the tag layer alone. The evidence sentences are withheld with the article. The table at the foot lists every tag the record carries; each row names the facet it belongs to, and the whose words column says whether the tag records the paper's own wording or the tagger's sentence about the paper. Every tag links to each other paper in the corpus carrying it. The machine-readable edition of the same thing is the TEI file beside this one, where the tags live in standOff, and the article is at its publisher via the link below. When we have changed our mind. Some entries in the table begin with a word in capitals and the reason for it. EVIDENCE CORRECTED — the finding still stands, but we had quoted the wrong sentence from the paper, and the quotation has been replaced with the right one. RETRACTED — the entry itself was wrong; it stays on the page, marked, with the reason, rather than being deleted. WITHDRAWN AND REPLACED — the entry was wrong, and a corrected version of it appears in the entries below. Each mark carries its own reason, in brackets, because the reasons differ from one entry to the next. An entry we have WITHDRAWN is removed from this page and kept in the record, with its reason. A line reading Audit and a date is a later re-reading of the entry against its whole sentence: DOUBTFUL means it was kept, and the reason says what is loose about it. Quotation marks inside the tagger's sentence. Where a tag is the tagger's own sentence, a phrase in quotation marks inside it is borrowed from the paper — the tagger's wording around it is not. The paper's own sentence is the evidence quote for that row; on this page it is withheld with the article, and the article is at its publisher. Nothing inside quotation marks anywhere on this page is ours: if it is quoted, it is the paper's. Whose words a concept carries. A concept entry records a term the paper itself uses, so the term, the sense given for it, and its evidence are the paper's own words, quoted where the paper fixes them. This is the opposite of a sense entry in the tag table, which is the tagger's sentence about how the paper uses a term. Where a concept entry could not be grounded in the paper's words, the entry says so on its own row.
Other fields define these differently the same word, defined another way in another discipline
standard deviation 3 fields · normalization 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 6 concept tags on this paper, all 6 are grounded in a quoted sentence.
figure – ground signals initial response transients recurrent interactions extrastriate areas Feedforward inhibitory models backward masking The mask replaces the target's information at the low level by the time descending signals arrive, so the recurrent V1-extrastriate loop that generates figure-ground modulation is cut off while the feedforward sweep is left intact. Perception proceeds in stages: a feedforward sweep first analyses elementary features, then recurrent interactions between V1 and higher areas bind them into a coherent percept, and only when that recurrent activity spreads into executive areas can a conscious report be made. Figure-ground modulation is necessary but not sufficient for report, because an independent decision stage is interposed between the V1 modulation and the animal's behavioural response. recurrent processing Figure – ground modulation feedforward inhibitory model figure position percentage correct responses orientation selectivity mask type t-test two-sided t test with the electrodes as a group one-sided t test with the electrodes as a group p-value standard deviation Error bars denote standard deviation standard error of the mean Error bars denote standard error of mean mean squared error mean squared difference median The median orientation selectivity ratio normalization we normalized at each electrode all responses electrophysiology

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
controlcontrolsan experiment run to eliminate a rival explanation
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/10.1162/089892902320474490. The reading view exists for the papers whose licence permits it.

Every tag on this page

claim_relations 2 · claim_type 1 · concept_edges 2 · concepts 6 · content_tags 34 · controls 1 · limitations 4 · mechanisms 3 · method 1 · phenomenon 1 · senses 3

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 2 relations here carry that mark. The rest are the tagger’s reading of the sentence quoted beside them.

facettagfieldconf.whose words
claim_typemechanism
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claim_typethe paper's words
phenomenonbackward masking of figure–ground segregation
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phenomenonthe paper's words
methodelectrophysiology
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methodthe paper's words
mechanismsmechanisms
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mechanisms[0]the tagger's words
mechanismsmechanisms
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about this quote: THE QUOTE STOPS WHERE THE EXTRACTED TEXT IS INTERRUPTED: after its last word the text runs into the axis labels and caption of Figure 6 ('…Figure 6. Orientation selectivity during pattern masking…'), so the words that completed the sentence are not continuous with it and are not quoted.
mechanisms[1]the tagger's words
mechanismsmechanisms
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mechanisms[2]the tagger's words
limitationsOrientation selectivity at the multiunit recording sites was weak, limiting the sensitivity of the feature-signal measure.
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what this limits: the feature-signal analysis at these sites: ORIENTATION SELECTIVITY AT THESE 'MULTIUNIT' SITES IS NOT VERY STRONG
limitations[0]the tagger's words
limitationsThe texture orientation comparison used only two fixed orientations, which further weakened the measured selectivity.
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what this limits: the texture-orientation comparison specifically: THE SELECTIVITY IS EVEN LESS PRONOUNCED, IN PART BECAUSE THERE WERE ONLY TWO ORIENTATIONS, FIXED AT 45 AND 135 DEGREES, TO COMPARE
limitations[1]the tagger's words
limitationsThe conclusion is one inferential step from the measurement, and the premise is stated.
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what this limits: the claim that masking interrupts recurrent processing: the authors reason from the premise that figure-ground modulations depend on feedback from extrastriate areas, and say their results suggest the interruption rather than show it
limitations[2]1.0the tagger's words
limitationsThe effect is selective: one signal is fully suppressed and another is unaffected.
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what this limits: any summary of what masking does to V1 activity here: figure-ground signals are selectively and fully suppressed at the intervals producing invisibility, while the initial response transients carrying the scene's features are not affected
limitations[3]1.0the tagger's words
controlsthe stimulus sets presented RANDOMISED OR INTERLEAVED rather than in blocks
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eliminates: electrode drift biasing the comparison - if one condition is recorded before another, any slow change in the recording is confounded with the condition, and interleaving spreads it across both · outcome (stated by the tagger, no quotation): held
controls[0]0.9the tagger's words
conceptsfigure – ground signals
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concepts[0]the paper's words
conceptsinitial response transients
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concepts[1]the paper's words
conceptsrecurrent interactions
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concepts[2]the paper's words
conceptsextrastriate areas
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concepts[3]the paper's words
conceptsFeedforward inhibitory models
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concepts[4]the paper's words
conceptsbackward masking
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concepts[5]the paper's words
sensesthe masking effect - SELECTIVE, AND BOTH HALVES ARE IN ONE SENTENCE: figure-ground signals are fully suppressed at exactly the intervals that make the target invisible, while the initial response transients are not affected, so 'masking reduces responses in V1' names one of two opposite results
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senses[0]1.0the tagger's words
sensesthe conclusion - HELD GIVEN AN IMPORTED PREMISE: the measurement is a suppression in V1 and the conclusion is about recurrent interactions with higher areas, reached because figure-ground modulations are taken to depend on feedback from extrastriate areas, and offered as a suggestion
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senses[1]1.0the tagger's words
sensesbackward masking - TWO RIVAL MODEL FAMILIES, NAMED: feedforward inhibitory models have the second stimulus inhibiting the first before it reaches a conscious level, while another family has masking interfering with reentrant or recurrent processing; the same phenomenon supports two different accounts of where it happens
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senses[2]1.0the tagger's words
claim_relationsreplicates → Lamme, Supèr, Landman, Roelfsema, & Spekreijse (2000)
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claim_relations[0]the tagger's words
claim_relationsreplicates → Supèr et al. (2001)
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claim_relations[1]the tagger's words
concept_edgesbackward masking —causes→ figure – ground signals
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holds when: at the target-mask intervals that make the target psychophysically invisible · direction on the measure: eliminates · strength of the relation: 0.7
concept_edges[0]the tagger's words
concept_edgesbackward masking —causes→ initial response transients
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direction on the measure: no-change · strength of the relation: 0.7
concept_edges[1]the tagger's words
content_tagst-test
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also in: t-test
content_tags.statistics[0]the tagger's words
content_tagst-test
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also in: t-test
content_tags.statistics[1]the tagger's words
content_tagsp-value
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also in: p-value
content_tags.statistics[2]the tagger's words
content_tagsstandard deviation
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content_tags.statistics[3]the tagger's words
content_tagsstandard error of the mean
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content_tags.statistics[4]the tagger's words
content_tagsmean squared error
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content_tags.statistics[5]the tagger's words
content_tagsmedian
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also in: median
content_tags.statistics[6]the tagger's words
content_tagsnormalization
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also in: normalization
content_tags.statistics[7]the tagger's words
content_tagsBackward masking abolishes the figure-ground signal in V1 exactly at those target-mask intervals at which the monkey cannot see the figure.
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content_tags.findings[0]the tagger's words
content_tagsThe early transient V1 response that codes the local features of the scene survives the mask untouched.
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content_tags.findings[1]the tagger's words
content_tagsWith a texture pattern mask at short SOAs the monkeys performed at chance in locating the figure, confirming that the masks made the figure invisible.
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content_tags.findings[2]the tagger's words
content_tagsWithout a mask, figure-ground signals were still present at very short SOAs.
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content_tags.findings[3]the tagger's words
content_tagsOrientation selectivity for the texture elements was essentially unaffected by backward masking at every SOA but the shortest.
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content_tags.findings[4]the tagger's words
content_tagsOrientation information about the line segments remains available in V1 even at the SOAs at which the animals see nothing.
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content_tags.findings[5]the tagger's words
content_tagsFigure-ground modulation tracks the psychometric curve far better (error 0.033) than orientation selectivity does (error 0.138).
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content_tags.findings[6]the tagger's words
content_tagsTrial by trial, the amount of figure-ground modulation did not predict whether the monkey reported seeing the figure.
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content_tags.findings[7]the tagger's words
content_tagsDetection of the figure occurs only when the stimulus also drives recurrent processing between V1 and higher areas, expressed as figure-ground modulation of V1 activity.
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content_tags.findings[8]the tagger's words
content_tagsbackward masking
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content_tags.definitions[0]the tagger's words
content_tagsrecurrent processing
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content_tags.definitions[1]the tagger's words
content_tagsFigure – ground modulation
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about this quote: THE QUOTE STOPS WHERE THE EXTRACTED TEXT IS INTERRUPTED: after its last word the text runs into the page's author running head and page number and then the labels of Figure 2 ('Lamme, Zipser, and Spekreijse 1045 Trial Figure-Ground…'), so the words that completed the sentence are not continuous with it and are not quoted.
content_tags.definitions[2]the tagger's words
content_tagsfeedforward inhibitory model
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content_tags.definitions[3]the tagger's words
content_tagsfigure position
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content_tags.variables[2]the tagger's words
content_tagspercentage correct responses
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content_tags.variables[4]the tagger's words
content_tagsorientation selectivity
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content_tags.variables[5]the tagger's words
content_tagsmask type
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also in: mask type
content_tags.variables[7]the tagger's words
content_tags0.033 — mean squared difference between the figure-ground neurometric curve and the behavioural psychometric curve
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content_tags.quantities[0]the tagger's words
content_tags0.138 — mean squared error between the orientation-selectivity neurometric curve and the same psychometric curve, i.e. the much poorer feedforward fit
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content_tags.quantities[1]the tagger's words
content_tagsp < .025 — significance threshold at which figure-ground modulation was present only at SOAs of 5-8 frames under pattern masking
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content_tags.quantities[2]the tagger's words
content_tags25 of these 32 electrodes — number of implanted V1 recording channels contributing data to this study
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content_tags.quantities[3]the tagger's words
content_tags700 (total 11,000) — trials collected per SOA/mask condition, and in total, for the neural analysis
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content_tags.quantities[4]the tagger's words
content_tags1.94 — median orientation-selectivity ratio of the multiunit recording sites
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content_tags.quantities[5]the tagger's words
content_tags14 – 110 msec — range of stimulus-onset asynchronies (1 to 8 monitor frames) between figure-ground display and mask
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content_tags.quantities[6]the tagger's words
content_tags100 msec — latency at which V1 responses start to distinguish figure from background texture
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content_tags.quantities[7]the tagger's words
content_tags0.18 — maximum figure-ground modulation, equated to 100% correct when building the neurometric curve
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content_tags.quantities[8]the tagger's words

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