Processing of natural images is feedforward: a simple behavioral test

Schmidt, Schmidt · Attention, Perception & Psychophysics · 2009 · cognitive-psychology · 10.3758/app.71.3.594 · record Schmidt2009-processing-of-natural-images-is-feedforward
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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. Claim type is 'existence' rather than 'method' because the rapid-chase criteria were proposed in earlier work (Schmidt et al., 2006; Vath & Schmidt, 2007) and are here applied, not introduced; the new claim is that natural-image priming in fact meets them. The source is pdftext, so the article text contains PDF artifacts (e.g. "stimulus– response" with a line-break space, "Van- Rullen"); quotes preserve these exactly. The limitation quote for the rapid-chase criteria stops before a trailing footnote marker ("...simple feedforward system.1") and is therefore an exact substring. 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.
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 WITHDRAWN AND REPLACED — the entry was wrong, and a corrected version of it appears in the entries below.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.

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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 4 concept tags on this paper, all 4 are grounded in a quoted sentence. All carry the tagger's gloss of what the term means in this paper, which is not something the article can license.
rapid-chase criteria feedforward independence criterion priming effects The prime's feedforward wave arrives at motor areas first and drives the movement alone until the target's wave arrives and takes over; a longer SOA gives the prime a longer unopposed drive, which is why priming grows with SOA. When no overt detour appears, opposing prime- and target-driven response tendencies conflict covertly and must be resolved before the movement can start, which shows up as a delayed onset instead. feedforward processing rapid chase spatial priming function prime–target SOA pointing trajectories rates of response errors F-test / ANOVA F tests jackknife jackknifing methods arcsine transformation arcsine-transformed error rates data smoothing filter standard error corrected for between-subjects variance behavioural-experiment

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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

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Every tag on this page

claim_relations 3 · claim_type 1 · concept_edges 2 · concepts 4 · content_tags 28 · controls 1 · limitations 4 · 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 2 relations here carry that mark. The rest are the tagger’s reading of the sentence quoted beside them.

facettagfieldconf.whose words
claim_typeexistence
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claim_typethe paper's words
phenomenonvisuomotor response priming with natural images
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phenomenonthe paper's words
methodbehavioural-experiment
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methodthe paper's words
mechanismsmechanisms
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mechanisms[0]the tagger's words
mechanismsmechanisms
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mechanisms[1]the tagger's words
limitationsThe paper does not claim that the rapid classification is driven by image semantics specifically.
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limitations[0]the tagger's words
limitationsIn the slow large-small task the independence criterion could not be clearly evaluated.
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limitations[1]the tagger's words
limitationsIn Experiment 1 the raw trajectories did not show the initiation criterion; the conclusion rests on the derived spatial priming functions.
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limitations[2]the tagger's words
limitationsMeeting the rapid-chase criteria shows behavioural equivalence to a feedforward system, not that every processing substage is feedforward.
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limitations[3]the tagger's words
controlseight sessions per participant, four in each task, with task order counterbalanced
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eliminates: that a difference between the two tasks is an order effect · outcome (stated by the tagger, no quotation): held
controls[0]0.95the tagger's words
conceptsrapid-chase criteria
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concepts[0]0.95the paper's words
conceptsfeedforward
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also in: feedforward
concepts[1]0.95the paper's words
conceptsindependence criterion
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concepts[2]0.95the paper's words
conceptspriming effects
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concepts[3]0.95the paper's words
sensesTHREE NAMED CRITERIA, EACH WITH ITS JOB STATED - THE CLEAREST `a tool must be checkable` IN THIS CORPUS: `(1) Prime rather than target signals should determine the onset and initial direction of the response (initiation criterion); (2) target signals should be able to influence the response before it is completed (takeover criterion); and, crucially, (3) response kinematics should initially depend exclusively on prime characteristics and be independent of all target characteristics (independence criterion).` Numbered, named, and separately falsifiable - a dataset can meet 1 and 2 and fail 3, which is exactly what happens in one of this paper's four tasks. Compare jitendra2016, which grades a literature against someone else's published checklist: same discipline, applied to a mechanism instead of a field
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senses[0]0.95the tagger's words
sensesAND THE CLAIM IS EQUIVALENCE, NOT IDENTITY, STATED BY THE AUTHORS IN THEIR OWN CONCLUSION: `our data indicate a rapid-chase system ... that is behaviorally equivalent to a feedforward system with high temporal resolution.` They say elsewhere that the criteria `do not guarantee that a stimulus-response system is strictly feedforward in all its substages`. A behavioural test that names the limit of what behaviour can establish. Most records in this corpus infer a mechanism from a behavioural measure; this one declines to, and says which claim the method does support instead
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senses[1]0.95the tagger's words
sensesTHE PAPER CONTAINS ITS OWN BOUNDARY CONDITION - ONE OF FOUR TASKS FAILS: `Only in the large-small task, with its tardy response dynamics and small priming effects, does it become difficult to evaluate whether the independence criterion is met.` And the diagnosis is offered rather than withheld: `It rather seems that the large-small classification cannot be performed in a single feedforward sweep and requires more extensive, recurrent processing.` Same images, same participants, same apparatus - only the classification rule changed, and the account stops applying. A scope limit measured inside the paper rather than conceded to a critic later
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senses[2]0.95the tagger's words
sensesAND THE DOSE-RESPONSE COMES WITH ITS MECHANISM ATTACHED, WHICH IS RARE: `Priming effects increase with prime-target SOA because the prime has more time to drive the response on its own when the target is further delayed.` The `because` is not decoration - it is the rapid-chase model making the prediction, and the effect size is a duration rather than a strength. dijksterhuis1998 doses by prime DURATION and gets a bigger effect; this doses by the GAP and gets a longer unopposed run - two different quantities that both look like `more priming` in a results table
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senses[3]0.95the tagger's words
claim_relationsextends → the authors' own rapid-chase theory of response priming (Schmidt et al., 2006; Vath & Schmidt, 2007)
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claim_relations[0]the tagger's words
claim_relationsbuilds-on → rapid natural-scene categorisation studies (Bacon-Macé et al., 2007; Kirchner & Thorpe, 2006; Thorpe et al., 1996; VanRullen & Koch, 2003; VanRullen & Thorpe, 2001, 2002)
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claim_relations[1]the tagger's words
claim_relationscontradicts → the claim that natural image classification is "ultra-rapid" (Kirchner & Thorpe, 2006; VanRullen & Thorpe, 2001)
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claim_relations[2]the tagger's words
concept_edgesfeedforward —operationalised-as→ rapid-chase criteria
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strength of the relation: 0.95 · note: THE WHOLE PAPER IN ONE EDGE, AND 'would show in the time course of the response' IS THE OPERATIONALISATION. A claim about neuronal signal flow is turned into three tests on a pointing trajectory. Weight 0.95: the criteria are named, numbered and separately checkable, and the authors state in the same passage that meeting them establishes BEHAVIOURAL EQUIVALENCE and not strict feedforward - so the edge is exactly as strong as the paper says it is, which is why it earns 0.95 rather than being hedged down.
concept_edges[0]0.95the tagger's words
concept_edgesindependence criterion —part-of→ rapid-chase criteria
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strength of the relation: 0.95 · note: THE THIRD OF THREE, and the quote carries all three in order with their names. Recorded separately because it is the one that FAILS in the large-small task - a corpus that holds only 'rapid-chase criteria' as one node cannot express that a system met two of them. Weight 0.95: the membership is explicit in the enumeration.
concept_edges[1]0.95the tagger's words
content_tagsF-test / ANOVA
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content_tags.statistics[0]the tagger's words
content_tagsjackknife
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also in: jackknife
content_tags.statistics[1]the tagger's words
content_tagsarcsine transformation
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content_tags.statistics[2]the tagger's words
content_tagsdata smoothing filter
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content_tags.statistics[3]the tagger's words
content_tagsstandard error
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content_tags.statistics[4]the tagger's words
content_tagsIn the animal-versus-object task, the time course of spatial priming matched the pattern the rapid-chase model predicts.
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content_tags.findings[0]the tagger's words
content_tagsSpatial priming curves for every prime-target SOA first followed one identical trajectory and branched off only later, in order of increasing SOA, in line with the independence criterion.
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content_tags.findings[1]the tagger's words
content_tagsThe large-versus-small size-judgement task was the one case where the independence criterion could not be assessed, because its responses were slow and its priming effects small.
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content_tags.findings[2]the tagger's words
content_tagsThe authors attribute the slowness of the size-judgement task to its needing recurrent processing rather than a single feedforward sweep.
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content_tags.findings[3]the tagger's words
content_tagsThere was no indication that natural-image categorisation is extraordinarily fast, or 'ultra-rapid'.
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content_tags.findings[4]the tagger's words
content_tagsWhen prime and target categories conflicted, the pointing hand physically veered into the quadrant indicated by the prime before reversing toward the correct target.
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content_tags.findings[5]the tagger's words
content_tagsPointing errors occurred almost only on inconsistent trials and grew with prime-target SOA, showing prime influence reaches the motor level.
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content_tags.findings[6]the tagger's words
content_tagsThe authors conclude that visuomotor priming reads out the first pass of information through the visuomotor system, before recurrent processing contributes.
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content_tags.findings[7]the tagger's words
content_tagsfeedforward processing
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content_tags.definitions[0]the tagger's words
content_tagsrapid chase
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also in: rapid chase
content_tags.definitions[1]the tagger's words
content_tagsrapid-chase criteria
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content_tags.definitions[2]the tagger's words
content_tagsindependence criterion
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content_tags.definitions[3]the tagger's words
content_tagsspatial priming function
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content_tags.definitions[4]the tagger's words
content_tagsprime–target SOA
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content_tags.variables[0]the tagger's words
content_tagspointing trajectories
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content_tags.variables[3]the tagger's words
content_tagsrates of response errors
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content_tags.variables[4]the tagger's words
content_tags380 msec — time after prime onset at which the hand began moving on consistent trials in the large-small task (versus roughly 300 msec in the animal-object task)
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about this quote: THE QUOTE CONTINUES A SENTENCE THAT THIS COPY CUTS IN TWO - a running head and the caption of Figure 3 stand between it and the words it follows, which read 'roughly 300 msec after prime onset in the'.
content_tags.quantities[0]the tagger's words
content_tags280 msec / 220 msec — movement onset times after prime onset in the toy-animal-object and ellipse-rectangle tasks of Experiment 2
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content_tags.quantities[1]the tagger's words
content_tags160 msec — lag of priming-effect onset in the large-small task relative to the ellipse-rectangle task
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content_tags.quantities[2]the tagger's words
content_tags33, 50, 67, 83, or 100 msec — the five prime-target stimulus onset asynchronies used, with primes shown for 33 msec
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content_tags.quantities[3]the tagger's words
content_tagsTwelve — total participants, six in each of the two experiments
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content_tags.quantities[4]the tagger's words
content_tags1.14% and 1.73% — trials discarded by the exclusion rules in Experiments 1 and 2
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content_tags.quantities[5]the tagger's words
content_tagsabout 80 msec — how much earlier spatial priming onset occurred in the animal-object task than in the large-small task
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content_tags.quantities[6]the tagger's words

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