Ensembles of human MTL neurons “jump back in time” in response to a repeated stimulus

Howard, Viskontas, Shankar, Fried · Hippocampus · 2012 · neuroscience · 10.1002/hipo.22018 · record Howard2012-ensembles-of-human-mtl-neurons-jump-back-in
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Where this record's text came from. faceted 2026-08 by reading the locally held text (xml); every evidence string verified as an exact substring of that text before merging. The paper's own claim is new; it converges with Manning et al. (2011), but that study used intracranial oscillatory measures during free recall rather than single units during continuous recognition, so it is recorded as 'extends' rather than treated as a replication. Claim type is 'existence' (a jump-back-in-time signature occurs in human MTL ensembles) even though the discussion goes on to speculate mechanistically about CA3 pattern completion — that mechanism is explicitly flagged in the text as speculative. 2026-08-13 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.
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Other fields define these differently the same word, defined another way in another discipline
short-term memory 2 fields · linear regression 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 20 concept tags on this paper, 1 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.
contiguity effect recency effect temporal context short-term memory jump back in time temporal autocorrelation lag one regression coefficient ensemble similarity MTL hippocampus entorhinal cortex amygdala continuous recognition block category recency lag pattern completion persistent firing artifact A repeated stimulus triggers pattern completion of the gradually-changing context state that was active when it was first experienced, so the recovered state resembles states both before and after the original presentation The contiguity effect is produced by a jump back in time in which the repeated item recovers the pre-presentation state of temporal context Long-timescale temporal autocorrelation is generated by network properties or intrinsic cellular mechanisms that sustain firing after a transient input temporally-autocorrelated units repetition of a stimulus average firing rate ensemble similarities of event vectors linear regression A linear regression showed a significant effect of recency on ensemble similarity t-test paired t-test paired t-test across recencies chi-squared test ANOVA An ANOVA with |lag| as a regressor and direction (forward vs backward) as a categorical variable z-score standardisation we z-transformed each unit’s activity across events Type I error rate electrophysiology

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second readingalternativesan independent re-reading of a facet, recorded whether or not it agrees
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
contributioncontributionwhat the paper claims to add
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
object of studyobject_of_studywhat the paper is about — the thing it investigates
phenomenonphenomenonthe effect or regularity under study
research questionresearch_questionthe question the paper sets itself
sensesensesa distinct use of a term, quoted where the paper fixes it
transfertransfersa method or concept carried in from another field
unrecordable relationunhoused_relationsa relation the paper asserts that this vocabulary cannot express, with the reason

The paper

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Every tag on this page

alternatives 3 · claim_relations 9 · claim_type 1 · concept_edges 9 · concepts 1 · content_tags 70 · contribution 1 · controls 1 · limitations 11 · mechanisms 6 · method 1 · object_of_study 1 · phenomenon 1 · research_question 1 · senses 6 · transfers 2 · unhoused_relations 1

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

facettagfieldconf.whose words
object_of_studywhether a repeated stimulus makes a neural ensemble return to the state it was in BEFORE that stimulus was first seen
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object_of_studythe paper's words
research_questionwhether cognitive models of retrieved temporal context can be told apart from short-term memory models at the level of human MTL units
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research_questionthe paper's words
contributionrepetition of a stimulus elicited an ensemble pattern resembling the pattern present before that stimulus was first presented, confirming a direct prediction of temporal context models
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contributionthe paper's words
claim_typeexistence
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claim_typethe paper's words
phenomenonneural contiguity effect in episodic memory ("jump back in time")
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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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mechanisms[1]the tagger's words
mechanismsmechanisms
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mechanisms[2]the tagger's words
mechanismsintrinsic cellular or network properties could produce persistent firing after a transient input, which is what a slowly changing representation would need
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mechanisms[3]1.0the tagger's words
mechanismsrecurrent CA3 connectivity could complete a gradually-changing pattern from a partial cue, which would recover the earlier context
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mechanisms[4]0.9the tagger's words
mechanismsa repeated stimulus recovers a state that is a mixture of earlier inputs weighted by temporal proximity, rather than reinstating its own original input
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mechanisms[5]1.0the tagger's words
limitationsThe data cannot establish whether the ensemble change caused by a stimulus's first presentation was specific to that stimulus.
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what this limits: what the ensemble change means: WE CANNOT DETERMINE WITH CERTAINTY FROM THESE DATA whether the change was specific to the stimulus or general
limitations[0]the tagger's words
limitationsThe experiment cannot bound the longest time scale over which the ensemble representation is autocorrelated.
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what this limits: the upper end of the timescale: THE RESULTS FROM THIS EXPERIMENT DO NOT PLACE A STRONG CONSTRAINT ON THE UPPER LIMIT OF THE TIME-SCALE OF THE AUTOCORRELATION
limitations[1]the tagger's words
limitationsAveraging firing rates over 3 s windows makes any faster regional differences undetectable.
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what this limits: any comparison between regions: WE AVERAGED OVER 3 s INTERVALS SO THAT DIFFERENCES BETWEEN REGIONS THAT MANIFEST ON SHORTER TIME SCALES WOULD BE INVISIBLE TO US
limitations[2]the tagger's words
limitationsThe blocked design leaves some variables (position in block, distribution of recencies, new/old ordering) uncontrolled.
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what this limits: every contrast in the blocked design: IT WOULD BE IMPOSSIBLE TO COMPLETELY CONTROL ALL POSSIBLE RELEVANT VARIABLES, so position in block, recency distribution and new/old ordering ride along
limitations[3]the tagger's words
limitationsThe analyses do not discriminate among mathematical forms of the gradual change.
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what this limits: the functional form of the change: OUR DATA ANALYSES ASSUME THAT THE ENSEMBLE CHANGES OVER TIME BUT THEY DO NOT UNIQUELY SUPPORT A PARTICULAR MATHEMATICAL FORM OF THE CHANGE
limitations[4]the tagger's words
limitationsRecency and contiguity had to be disentangled statistically rather than by design.
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what this limits: the recency-versus-contiguity separation, done statistically rather than by design: FUTURE RESEARCH SHOULD DISENTANGLE RECENCY FROM CONTIGUITY BY, FOR INSTANCE, PRESENTING REPEATED STIMULI AFTER A LONG DELAY
limitations[5]the tagger's words
limitationsthe mechanistic account of how the jump back in time is accomplished is labelled necessarily speculative
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what this limits: the mechanistic account that follows: WHILE NECESSARILY SPECULATIVE, IT IS WORTH THINKING ABOUT HOW THESE TWO FUNCTIONS MIGHT BE ACCOMPLISHED
limitations[6]1.0the tagger's words
limitationsthe data cannot settle what exactly is retrieved when the ensemble state is recovered
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what this limits: the same scope as limitations[0] - what exactly is retrieved is undetermined
limitations[7]1.0the tagger's words
limitationsfiring was averaged over three-second intervals, so regional differences on shorter timescales could not be seen
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what this limits: the same scope as limitations[2] - the 3 s averaging hides faster regional differences
limitations[8]1.0the tagger's words
limitationssome design variables cannot be controlled at all: the first stimulus of a block is necessarily new and the last necessarily old
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what this limits: the blocked design: IT IS NECESSARILY THE CASE THAT THE FIRST STIMULUS SHOWN IN A BLOCK IS NEW AND THE LAST STIMULUS IN THE BLOCK IS OLD
limitations[9]1.0the tagger's words
limitationsautocorrelated units did not show robust stimulus coding by this method, only category specificity
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what this limits: the stimulus-coding claim: ROBUST STIMULUS CODING WAS NOT OBSERVED USING THIS METHOD IN THE TEMPORALLY-AUTOCORRELATED PART OF THE ENSEMBLE, t(15) = 0.46 - only category specificity was
limitations[10]0.85the tagger's words
transfersretrieved temporal context, brought from list-memory modelling to a prediction about single units
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transfers[0]1.0the tagger's words
transfersrecency and contiguity as the two effects any account must produce
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transfers[1]1.0the tagger's words
controlsthe analysis restricted to pairs of events WITHIN THE SAME BLOCK, which were necessarily from the same category
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eliminates: category membership as an artefactual source of contiguity - events from one category cluster in time by construction, so a temporal-contiguity effect could be category structure wearing a clock · outcome (stated by the tagger, no quotation): held
controls[0]0.95the tagger's words
conceptscontiguity effect
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concepts[0]0.85the paper's words
unhoused_relationscategory → event number
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THE TWO CANNOT BE SEPARATED IN THIS STUDY - the DESIGN form of the negative relation / No edge type can express it: all eight assert that a relation HOLDS. Recorded here because a confounding statement BOUNDS WHAT THE PAPER'S OWN RESULTS CAN MEAN, and it lives in a methods paragraph where nothing downstream will find it. A design confound stated plainly in a methods sentence.
unhoused_relations[0]the tagger's words
sensesTHE TWO RIVALS ARE MADE TO AGREE EVERYWHERE BUT ONE PLACE: both predict a gradually changing state caused by the stimuli, and the paper says so before testing anything
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senses[0]1.0the tagger's words
sensesand the discriminating prediction is an ASYMMETRY: short-term memory predicts resemblance only to states AFTER the original presentation, a jump back in time predicts resemblance in both directions
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senses[1]1.0the tagger's words
sensesa jump back in time is defined as recovering the context that existed BEFORE the stimulus was first presented, not as reinstating the stimulus's own input
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senses[2]1.0the tagger's words
sensestemporally-autocorrelated is an operational label: units whose lag-one regression coefficient on the previous event's firing rate is significantly above zero, about a quarter of all units
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senses[3]1.0the tagger's words
senseseach unit is treated as an independent observation and as a one-cell ensemble, because unit counts vary across sessions and sessions were at least 48 hours apart
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senses[4]1.0the tagger's words
sensesthe design was chosen over free recall precisely because repetition order is under experimenter control rather than following the subject's own retrieval
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senses[5]1.0the tagger's words
alternativesclaim_type: existence
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a second reading reaching the same value. Recorded: existence — note: a second reading reaching the same value from a different sentence. Not applied - a person decides.
alternatives.claim_typethe tagger's words
alternativesmethod: microwire single-unit recording during a continuous recognition task, with ensemble similarity analysed as a function of recency and of lag from the original presentation
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a second reading DIFFERING from the recorded value. Recorded: electrophysiology — note: a second reading, verbatim-verified, disagreeing with the value on the record. Not applied - a person decides.
alternatives.methodthe tagger's words
alternativesphenomenon: temporal autocorrelation of MTL ensemble firing over tens of seconds, with a contiguity effect superimposed on it
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a second reading DIFFERING from the recorded value. Recorded: neural contiguity effect in episodic memory ("jump back in time") — note: a second reading, verbatim-verified, disagreeing with the value on the record. Not applied - a person decides.
alternatives.phenomenonthe tagger's words
claim_relationsbuilds-on → retrieved temporal context models of episodic memory
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claim_relations[0]the tagger's words
claim_relationsextends → Manning et al. (2011)
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claim_relations[1]the tagger's words
claim_relationscontradicts → Norman and O'Reilly (2003)
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claim_relations[2]the tagger's words
claim_relationscontradicts → accounts identifying the MTL ensemble with persistent stimulus-specific activation in short-term memory
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claim_relations[3]the tagger's words
claim_relationscontradicts → short-term memory accounts in which contiguity comes from persistent stimulus activation and direct inter-item associations
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claim_relations[4]1.0the tagger's words
claim_relationssupports → retrieved temporal context models of recency and contiguity
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claim_relations[5]1.0the tagger's words
claim_relationsextends → Manning 2011's finding that recall reinstates the pattern present during study of preceding items
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status: the paper's own words: is not clear
claim_relations[6]1.0the tagger's words
claim_relationscontradicts → models in which the gradually changing memory representation is independent of the stimuli presented
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claim_relations[7]1.0the tagger's words
claim_relationsbuilds-on → evidence for temporal autocorrelation and stimulus selectivity in MTL neurons
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claim_relations[8]0.9the tagger's words
concept_edgesjump back in time —distinct-from→ short-term memory
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strength of the relation: 1 · note: AND THEY DIFFER IN EXACTLY ONE PLACE: short-term memory predicts resemblance only FORWARD of the original presentation, a jump back predicts it in both directions
concept_edges[1]1.0the tagger's words
concept_edgesjump back in time —part-of→ temporal context
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strength of the relation: 1 · note: the recovered state is a mixture of earlier inputs weighted by proximity, NOT a reinstatement of the stimulus's own input
concept_edges[2]1.0the tagger's words
concept_edgesblock —distinct-from→ temporal autocorrelation
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strength of the relation: 1 · note: and the block structure is removed by restricting every comparison to pairs of events inside one block Audit 2026-09-28: DOUBTFUL - read against its span and kept, but the span isolates autocorrelation from block effects; distinct-from is loose.
concept_edges[7]1.0the tagger's words
concept_edgesrecency —causes→ ensemble similarity
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strength of the relation: 1 · note: and the recency gradient is then ESTIMATED and SUBTRACTED, so what remains is the contiguity effect alone Audit 2026-09-28: DOUBTFUL - read against its span and kept, but the span is a counterfactual ('if recency were the only factor'); causes states it as a finding.
concept_edges[9]1.0the tagger's words
concept_edgespersistent firing —causes→ temporal autocorrelation
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strength of the relation: 0.9 Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but the autocorrelation 'COULD RESULT FROM' properties leading to persistent firing; causes is hedged.
concept_edges[10]1.0the tagger's words
concept_edgespattern completion —causes→ jump back in time
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strength of the relation: 0.8 · note: offered as the recovery mechanism, from the recurrent structure of CA3 Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but CA3's structure 'COULD BE USED FOR' pattern completion to recover the state; causes is hedged.
concept_edges[11]0.8the tagger's words
concept_edgeshippocampus —contrasted-with→ amygdala
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strength of the relation: 1 · note: A REGIONAL NULL: hippocampus, parahippocampal region and entorhinal cortex all far exceed the Type I error rate and do not differ from each other; the amygdala does not exceed it at all Audit 2026-09-28: DOUBTFUL - read against its span and kept, but the span is cut before the regional contrast is stated.
also in: hippocampus · amygdala
concept_edges[12]1.0the tagger's words
concept_edgescontinuous recognition —operationalised-as→ jump back in time
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strength of the relation: 1 · note: chosen over free recall BECAUSE the repetition order is set by the experimenter rather than by the subject's retrieval Audit 2026-09-28: DOUBTFUL - read against its full span and kept, but the continuous recognition experiment gives 'a better opportunity to assess' the jump back in time; operationalised-as is loose.
concept_edges[13]1.0the tagger's words
concept_edgesrecency effect —contrasted-with→ contiguity effect
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strength of the relation: 1 · note: the two behavioural effects any account must produce, and here they appear superimposed in one curve
concept_edges[14]1.0the tagger's words
content_tagslinear regression
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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_tagspaired t-test
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also in: paired t-test
content_tags.statistics[2]the tagger's words
content_tagschi-squared test
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content_tags.statistics[3]the tagger's words
content_tagsANOVA
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also in: ANOVA
content_tags.statistics[4]the tagger's words
content_tagsz-score standardisation
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content_tags.statistics[5]the tagger's words
content_tagslag one regression coefficient
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content_tags.statistics[6]1.0the tagger's words
content_tagsType I error rate
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content_tags.statistics[7]1.0the tagger's words
content_tagspaired t-test
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also in: paired t-test
content_tags.statistics[8]0.7the tagger's words
content_tagsMTL ensemble activity changed gradually over tens of seconds, and the change was causally affected by which stimulus was shown.
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content_tags.findings[0]the tagger's words
content_tagsRepeating a stimulus recovered ensemble activity that had been present before its original presentation — a reliable backward contiguity effect.
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content_tags.findings[1]the tagger's words
content_tagsEnsemble similarity also fell off in the forward direction, which is consistent with either short-term memory or retrieved-context accounts.
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content_tags.findings[2]the tagger's words
content_tagsEnsemble similarity was greater for same-category than for different-category pairs.
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content_tags.findings[3]the tagger's words
content_tagsThe temporally autocorrelated part of the ensemble did not show robust stimulus coding.
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content_tags.findings[4]the tagger's words
content_tagsThe contiguity analysis gives very strong evidence against all of the temporal autocorrelation being artifactual.
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content_tags.findings[5]the tagger's words
content_tagsTHE RIVALS SHARE TWO PREDICTIONS BY CONSTRUCTION: both require a gradually changing state caused by the presented stimuli
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content_tags.findings[6]1.0the tagger's words
content_tagsAND DIFFER IN ONE ASYMMETRY: short-term memory predicts resemblance only to states following the original presentation, a jump back in time predicts both directions
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content_tags.findings[7]1.0the tagger's words
content_tagsso the signature sought is a repeated stimulus recovering activity present BEFORE its original presentation
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content_tags.findings[8]1.0the tagger's words
content_tagslag one regression coefficients were above zero overall and about a quarter of units qualified as temporally autocorrelated
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content_tags.findings[9]1.0the tagger's words
content_tagsautocorrelated units fired above baseline BEFORE the stimulus appeared, so they were not simply responding to it
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content_tags.findings[10]1.0the tagger's words
content_tagshippocampus, parahippocampal region and entorhinal cortex all far exceeded the Type I error rate; the amygdala did not
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content_tags.findings[11]1.0the tagger's words
content_tagsBLOCK STRUCTURE REMOVED BY RESTRICTION: all comparisons confined to pairs of events within one block, which are necessarily same-category
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content_tags.findings[12]1.0the tagger's words
content_tagsA LOWER BOUND ON THE TIMESCALE: excluding the eight nearest recencies still left a significant slope, so the ensemble kept changing past 27 seconds
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content_tags.findings[13]1.0the tagger's words
content_tagsCATEGORY AND RECENCY SEPARATED BY MATCHING: comparisons made across pairs of similarities at the same recency
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content_tags.findings[14]1.0the tagger's words
content_tagsso the category effect cannot be attributed to the confounding of recency with category structure
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content_tags.findings[15]1.0the tagger's words
content_tagsA DISSOCIATION INSIDE THE ENSEMBLE: the autocorrelated units showed category specificity but not robust stimulus coding, t = 0.46
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content_tags.findings[16]0.85the tagger's words
content_tagswhile the non-autocorrelated units showed both stimulus and category selectivity
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content_tags.findings[17]1.0the tagger's words
content_tagsTHE ARTEFACT CLASS DEFINED BY WHAT IT CANNOT KNOW: no recording artefact would make spike shape depend on which picture was shown
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content_tags.findings[18]1.0the tagger's words
content_tagsONE ANALYSIS SERVING TWO PURPOSES: the contiguity analysis both diagnoses a causal link to the stimulus and looks for the jump back in time
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content_tags.findings[19]1.0the tagger's words
content_tagsand the question is declared meaningless for units that are not autocorrelated in the first place
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content_tags.findings[20]1.0the tagger's words
content_tagsSORTING ERROR ONE ANSWERED: splitting one neuron across units could fake autocorrelation but not stimulus specificity, block sensitivity, or retained information about preceding stimuli
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content_tags.findings[21]1.0the tagger's words
content_tagsSORTING ERROR TWO ANSWERED: merging neurons could fake conjunctions, but not a response to the neighbours of a particular stimulus's original presentation
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content_tags.findings[22]1.0the tagger's words
content_tagscurves peaked at zero and falling off both ways would otherwise require the particular picture to change the shape of recorded spikes
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content_tags.findings[23]1.0the tagger's words
content_tagsAND AN ENVIRONMENTAL CLASS RULED OUT TOO: a fan or other sound present during part of a session cannot produce a contiguity effect
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content_tags.findings[24]1.0the tagger's words
content_tagsthe artefactual and stimulus-independent accounts would both have predicted a flat curve
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content_tags.findings[25]1.0the tagger's words
content_tagsTHE DECIDING RESULT: the backward effect is not predicted by persistent stimulus activation but is predicted by a jump back in time
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content_tags.findings[26]1.0the tagger's words
content_tagsthe recency gradient was estimated and subtracted so that what remained on the lag axis was contiguity alone
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content_tags.findings[27]1.0the tagger's words
content_tagsSOME CONFOUNDS ARE STRUCTURAL AND UNCONTROLLABLE: the first stimulus of a block is necessarily new and the last necessarily old
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content_tags.findings[28]1.0the tagger's words
content_tagsthe prior free-recall result had two named limitations: it was not at unit level, and recall order was set by the subject
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content_tags.findings[29]1.0the tagger's words
content_tagswhich is why repetition under experimenter control gives a better test of the causal relationship
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content_tags.findings[30]1.0the tagger's words
content_tagsUNIT CRITERIA STATED NUMERICALLY: clear refractory periods, amplitude over 100 microvolts, under 1 percent of spikes below 3 ms
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content_tags.findings[31]1.0the tagger's words
content_tagswith a power-spectrum check discarding units carrying significant 60 Hz line noise
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content_tags.findings[32]1.0the tagger's words
content_tagsand every unit inspected by a human observer as well as by the clustering algorithm
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content_tags.findings[33]1.0the tagger's words
content_tagsthe three-second analysis window is shorter than the minimum inter-stimulus interval, so no spike is counted twice
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content_tags.findings[34]1.0the tagger's words
content_tagspatients discriminated new from old reliably with no bias, hit rate .82 and correct rejection .83
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content_tags.findings[35]1.0the tagger's words
content_tagsrecency effect
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content_tags.definitions[0]the tagger's words
content_tagstemporally-autocorrelated units
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content_tags.definitions[1]the tagger's words
content_tagslag one regression coefficient
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content_tags.definitions[3]the tagger's words
content_tagscontiguity effect
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content_tags.definitions[4]1.0the tagger's words
content_tagsjump back in time
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content_tags.definitions[5]1.0the tagger's words
content_tagstemporal autocorrelation
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content_tags.definitions[6]0.9the tagger's words
content_tagsensemble similarity
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content_tags.definitions[7]0.7the tagger's words
content_tagsrepetition of a stimulus
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content_tags.variables[0]the tagger's words
content_tagsaverage firing rate
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content_tags.variables[3]the tagger's words
content_tagsensemble similarities of event vectors
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content_tags.variables[4]the tagger's words
content_tagsrecency
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also in: recency
content_tags.variables[5]1.0the tagger's words
content_tagslag
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also in: lag
content_tags.variables[6]0.8the tagger's words
content_tagstemporal autocorrelation
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content_tags.variables[7]1.0the tagger's words
content_tags.248 — proportion of recorded units classified as temporally autocorrelated
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content_tags.quantities[0]the tagger's words
content_tags44/270 — number of units that were category-selective
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content_tags.quantities[1]the tagger's words
content_tagsmean .094 ± .01 — average lag one regression coefficient across units, significantly above zero
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content_tags.quantities[2]the tagger's words
content_tagshit rate = .82 ± .07; correct rejection rate = .83 ± .07 — patients' recognition performance on the continuous recognition task
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content_tags.quantities[3]the tagger's words
content_tags.0042 ± .0015, F (1, 9) = 7.48, p < .03 — backward-direction regression of ensemble similarity on |lag| — the key jump-back-in-time result
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content_tags.quantities[4]the tagger's words
content_tagsmore than 27 s — lower bound on the time scale over which the ensemble kept changing reliably
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content_tags.quantities[5]the tagger's words
content_tagsfour patients, eight recording sessions — size of the human single-unit dataset
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content_tags.quantities[6]the tagger's words
content_tags.248 — share of units classified as temporally autocorrelated
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content_tags.quantities[7]1.0the tagger's words
content_tagsmore than 27 s — lower bound on the timescale over which the ensemble kept changing
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content_tags.quantities[8]1.0the tagger's words
content_tags> 100 microvolts and less than 1% — amplitude and refractory-violation criteria defining a single unit
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content_tags.quantities[9]1.0the tagger's words
content_tags3.10 s — minimum inter-stimulus interval, which is what makes the 3 s window safe
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content_tags.quantities[10]1.0the tagger's words
content_tags.82 ± .07 and .83 ± .07 — hit rate and correct rejection rate, showing no response bias
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content_tags.quantities[11]1.0the tagger's words

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