Knowing Each Random Error of Our Ways, but Hardly Correcting for It: An Instance of Optimal Performance
Identifieur interne : 001A61 ( Main/Curation ); précédent : 001A60; suivant : 001A62Knowing Each Random Error of Our Ways, but Hardly Correcting for It: An Instance of Optimal Performance
Auteurs : Loes C. J. Van Dam [Allemagne] ; Marc O. Ernst [Allemagne]Source :
- PLoS ONE [ 1932-6203 ] ; 2013.
Abstract
Random errors are omnipresent in sensorimotor tasks due to perceptual and motor noise. The question is, are humans aware of their random errors on an instance-by-instance basis? The appealing answer would be ‘no’ because it seems intuitive that humans would otherwise immediately correct for the errors online, thereby increasing sensorimotor precision. However, here we show the opposite. Participants pointed to visual targets with varying degree of feedback. After movement completion participants indicated whether they believed they landed left or right of target. Surprisingly, participants' left/right-discriminability was well above chance, even without visual feedback. Only when forced to correct for the error after movement completion did participants loose knowledge about the remaining error, indicating that random errors can only be accessed offline. When correcting, participants applied the optimal correction gain, a weighting factor between perceptual and motor noise, minimizing end-point variance. Together these results show that humans optimally combine direct information about sensorimotor noise in the system (the current random error), with indirect knowledge about the variance of the perceptual and motor noise distributions. Yet, they only appear to do so offline after movement completion, not while the movement is still in progress, suggesting that during movement proprioceptive information is less precise.
Url:
DOI: 10.1371/journal.pone.0078757
PubMed: 24205308
PubMed Central: 3813602
Links toward previous steps (curation, corpus...)
- to stream Pmc, to step Corpus: Pour aller vers cette notice dans l'étape Curation :002309
- to stream Pmc, to step Curation: Pour aller vers cette notice dans l'étape Curation :002309
- to stream Pmc, to step Checkpoint: Pour aller vers cette notice dans l'étape Curation :001173
- to stream Ncbi, to step Merge: Pour aller vers cette notice dans l'étape Curation :002A69
- to stream Ncbi, to step Curation: Pour aller vers cette notice dans l'étape Curation :002A69
- to stream Ncbi, to step Checkpoint: Pour aller vers cette notice dans l'étape Curation :002A69
- to stream Main, to step Merge: Pour aller vers cette notice dans l'étape Curation :001A79
Links to Exploration step
PMC:3813602Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Knowing Each Random Error of Our Ways, but Hardly Correcting for It: An Instance of Optimal Performance</title>
<author><name sortKey="Van Dam, Loes C J" sort="Van Dam, Loes C J" uniqKey="Van Dam L" first="Loes C. J." last="Van Dam">Loes C. J. Van Dam</name>
<affiliation wicri:level="1"><nlm:aff id="aff1"><addr-line>Department of Cognitive Neuroscience, Universität Bielefeld, Bielefeld, Germany</addr-line>
</nlm:aff>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Department of Cognitive Neuroscience, Universität Bielefeld, Bielefeld</wicri:regionArea>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><nlm:aff id="aff2"><addr-line>Cognitive Interaction Technology Center of Excellence, Universität Bielefeld, Bielefeld, Germany</addr-line>
</nlm:aff>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Cognitive Interaction Technology Center of Excellence, Universität Bielefeld, Bielefeld</wicri:regionArea>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Ernst, Marc O" sort="Ernst, Marc O" uniqKey="Ernst M" first="Marc O." last="Ernst">Marc O. Ernst</name>
<affiliation wicri:level="1"><nlm:aff id="aff1"><addr-line>Department of Cognitive Neuroscience, Universität Bielefeld, Bielefeld, Germany</addr-line>
</nlm:aff>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Department of Cognitive Neuroscience, Universität Bielefeld, Bielefeld</wicri:regionArea>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><nlm:aff id="aff2"><addr-line>Cognitive Interaction Technology Center of Excellence, Universität Bielefeld, Bielefeld, Germany</addr-line>
</nlm:aff>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Cognitive Interaction Technology Center of Excellence, Universität Bielefeld, Bielefeld</wicri:regionArea>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
</affiliation>
<affiliation wicri:level="3"><nlm:aff id="aff3"><addr-line>Bernstein Center for Computational Neuroscience, Tübingen, Germany</addr-line>
</nlm:aff>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Bernstein Center for Computational Neuroscience, Tübingen</wicri:regionArea>
<placeName><region type="land" nuts="1">Bade-Wurtemberg</region>
<region type="district" nuts="2">District de Tübingen</region>
<settlement type="city">Tübingen</settlement>
</placeName>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">PMC</idno>
<idno type="pmid">24205308</idno>
<idno type="pmc">3813602</idno>
<idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3813602</idno>
<idno type="RBID">PMC:3813602</idno>
<idno type="doi">10.1371/journal.pone.0078757</idno>
<date when="2013">2013</date>
<idno type="wicri:Area/Pmc/Corpus">002309</idno>
<idno type="wicri:Area/Pmc/Curation">002309</idno>
<idno type="wicri:Area/Pmc/Checkpoint">001173</idno>
<idno type="wicri:Area/Ncbi/Merge">002A69</idno>
<idno type="wicri:Area/Ncbi/Curation">002A69</idno>
<idno type="wicri:Area/Ncbi/Checkpoint">002A69</idno>
<idno type="wicri:Area/Main/Merge">001A79</idno>
<idno type="wicri:Area/Main/Curation">001A61</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Knowing Each Random Error of Our Ways, but Hardly Correcting for It: An Instance of Optimal Performance</title>
<author><name sortKey="Van Dam, Loes C J" sort="Van Dam, Loes C J" uniqKey="Van Dam L" first="Loes C. J." last="Van Dam">Loes C. J. Van Dam</name>
<affiliation wicri:level="1"><nlm:aff id="aff1"><addr-line>Department of Cognitive Neuroscience, Universität Bielefeld, Bielefeld, Germany</addr-line>
</nlm:aff>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Department of Cognitive Neuroscience, Universität Bielefeld, Bielefeld</wicri:regionArea>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><nlm:aff id="aff2"><addr-line>Cognitive Interaction Technology Center of Excellence, Universität Bielefeld, Bielefeld, Germany</addr-line>
</nlm:aff>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Cognitive Interaction Technology Center of Excellence, Universität Bielefeld, Bielefeld</wicri:regionArea>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Ernst, Marc O" sort="Ernst, Marc O" uniqKey="Ernst M" first="Marc O." last="Ernst">Marc O. Ernst</name>
<affiliation wicri:level="1"><nlm:aff id="aff1"><addr-line>Department of Cognitive Neuroscience, Universität Bielefeld, Bielefeld, Germany</addr-line>
</nlm:aff>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Department of Cognitive Neuroscience, Universität Bielefeld, Bielefeld</wicri:regionArea>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
</affiliation>
<affiliation wicri:level="1"><nlm:aff id="aff2"><addr-line>Cognitive Interaction Technology Center of Excellence, Universität Bielefeld, Bielefeld, Germany</addr-line>
</nlm:aff>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Cognitive Interaction Technology Center of Excellence, Universität Bielefeld, Bielefeld</wicri:regionArea>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
<wicri:noRegion>Bielefeld</wicri:noRegion>
</affiliation>
<affiliation wicri:level="3"><nlm:aff id="aff3"><addr-line>Bernstein Center for Computational Neuroscience, Tübingen, Germany</addr-line>
</nlm:aff>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Bernstein Center for Computational Neuroscience, Tübingen</wicri:regionArea>
<placeName><region type="land" nuts="1">Bade-Wurtemberg</region>
<region type="district" nuts="2">District de Tübingen</region>
<settlement type="city">Tübingen</settlement>
</placeName>
</affiliation>
</author>
</analytic>
<series><title level="j">PLoS ONE</title>
<idno type="eISSN">1932-6203</idno>
<imprint><date when="2013">2013</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc><textClass></textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en"><p>Random errors are omnipresent in sensorimotor tasks due to perceptual and motor noise. The question is, are humans aware of their random errors on an instance-by-instance basis? The appealing answer would be ‘no’ because it seems intuitive that humans would otherwise immediately correct for the errors online, thereby increasing sensorimotor precision. However, here we show the opposite. Participants pointed to visual targets with varying degree of feedback. After movement completion participants indicated whether they believed they landed left or right of target. Surprisingly, participants' left/right-discriminability was well above chance, even without visual feedback. Only when forced to correct for the error after movement completion did participants loose knowledge about the remaining error, indicating that random errors can only be accessed offline. When correcting, participants applied the optimal correction gain, a weighting factor between perceptual and motor noise, minimizing end-point variance. Together these results show that humans optimally combine direct information about sensorimotor noise in the system (the current random error), with indirect knowledge about the variance of the perceptual and motor noise distributions. Yet, they only appear to do so offline after movement completion, not while the movement is still in progress, suggesting that during movement proprioceptive information is less precise.</p>
</div>
</front>
<back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Faisal, A" uniqKey="Faisal A">A Faisal</name>
</author>
<author><name sortKey="Selen, L" uniqKey="Selen L">L Selen</name>
</author>
<author><name sortKey="Wolpert, D" uniqKey="Wolpert D">D Wolpert</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Ernst, M" uniqKey="Ernst M">M Ernst</name>
</author>
<author><name sortKey="Banks, M" uniqKey="Banks M">M Banks</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Blake, A" uniqKey="Blake A">A Blake</name>
</author>
<author><name sortKey="Bulthoff, H" uniqKey="Bulthoff H">H Bülthoff</name>
</author>
<author><name sortKey="Sheinberg, D" uniqKey="Sheinberg D">D Sheinberg</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Landy, M" uniqKey="Landy M">M Landy</name>
</author>
<author><name sortKey="Maloney, L" uniqKey="Maloney L">L Maloney</name>
</author>
<author><name sortKey="Johnston, E" uniqKey="Johnston E">E Johnston</name>
</author>
<author><name sortKey="Young, M" uniqKey="Young M">M Young</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Van Beers, R" uniqKey="Van Beers R">R van Beers</name>
</author>
<author><name sortKey="Sittig, A" uniqKey="Sittig A">A Sittig</name>
</author>
<author><name sortKey="Denier Van Der Gon, J" uniqKey="Denier Van Der Gon J">J Denier van der Gon</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Baddeley, R" uniqKey="Baddeley R">R Baddeley</name>
</author>
<author><name sortKey="Ingram, H" uniqKey="Ingram H">H Ingram</name>
</author>
<author><name sortKey="Miall, R" uniqKey="Miall R">R Miall</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Burge, J" uniqKey="Burge J">J Burge</name>
</author>
<author><name sortKey="Ernst, M" uniqKey="Ernst M">M Ernst</name>
</author>
<author><name sortKey="Banks, M" uniqKey="Banks M">M Banks</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Kording, K" uniqKey="Kording K">K Körding</name>
</author>
<author><name sortKey="Wolpert, D" uniqKey="Wolpert D">D Wolpert</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Korenberg, A" uniqKey="Korenberg A">A Korenberg</name>
</author>
<author><name sortKey="Ghahramani, Z" uniqKey="Ghahramani Z">Z Ghahramani</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Miall, R" uniqKey="Miall R">R Miall</name>
</author>
<author><name sortKey="Wolpert, D" uniqKey="Wolpert D">D Wolpert</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Wolpert, D" uniqKey="Wolpert D">D Wolpert</name>
</author>
<author><name sortKey="Ghahramani, Z" uniqKey="Ghahramani Z">Z Ghahramani</name>
</author>
<author><name sortKey="Jordan, M" uniqKey="Jordan M">M Jordan</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Harris, C" uniqKey="Harris C">C Harris</name>
</author>
<author><name sortKey="Wolpert, D" uniqKey="Wolpert D">D Wolpert</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Hamilton, A" uniqKey="Hamilton A">A Hamilton</name>
</author>
<author><name sortKey="Wolpert, D" uniqKey="Wolpert D">D Wolpert</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Todorov, E" uniqKey="Todorov E">E Todorov</name>
</author>
<author><name sortKey="Jordan, M" uniqKey="Jordan M">M Jordan</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Van Beers, Rj" uniqKey="Van Beers R">RJ van Beers</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Sabes, P" uniqKey="Sabes P">P Sabes</name>
</author>
<author><name sortKey="Jordan, M" uniqKey="Jordan M">M Jordan</name>
</author>
</analytic>
</biblStruct>
<biblStruct></biblStruct>
<biblStruct><analytic><author><name sortKey="Goble, Dj" uniqKey="Goble D">DJ Goble</name>
</author>
<author><name sortKey="Noble, Bc" uniqKey="Noble B">BC Noble</name>
</author>
<author><name sortKey="Brown, Sh" uniqKey="Brown S">SH Brown</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Cheron, G" uniqKey="Cheron G">G Cheron</name>
</author>
<author><name sortKey="Dan, B" uniqKey="Dan B">B Dan</name>
</author>
<author><name sortKey="Borenstein, S" uniqKey="Borenstein S">S Borenstein</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Chapman, C" uniqKey="Chapman C">C Chapman</name>
</author>
<author><name sortKey="Bushnell, M" uniqKey="Bushnell M">M Bushnell</name>
</author>
<author><name sortKey="Miron, D" uniqKey="Miron D">D Miron</name>
</author>
<author><name sortKey="Duncan, G" uniqKey="Duncan G">G Duncan</name>
</author>
<author><name sortKey="Lund, J" uniqKey="Lund J">J Lund</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Post, L" uniqKey="Post L">L Post</name>
</author>
<author><name sortKey="Zompa, I" uniqKey="Zompa I">I Zompa</name>
</author>
<author><name sortKey="Chapman, C" uniqKey="Chapman C">C Chapman</name>
</author>
</analytic>
</biblStruct>
<biblStruct></biblStruct>
<biblStruct><analytic><author><name sortKey="Collins, D" uniqKey="Collins D">D Collins</name>
</author>
<author><name sortKey="Refshauge, K" uniqKey="Refshauge K">K Refshauge</name>
</author>
<author><name sortKey="Todd, G" uniqKey="Todd G">G Todd</name>
</author>
<author><name sortKey="Gandevia, S" uniqKey="Gandevia S">S Gandevia</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Edin, B" uniqKey="Edin B">B Edin</name>
</author>
<author><name sortKey="Johansson, N" uniqKey="Johansson N">N Johansson</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Edin, B" uniqKey="Edin B">B Edin</name>
</author>
</analytic>
</biblStruct>
<biblStruct><analytic><author><name sortKey="Trommersh User, J" uniqKey="Trommersh User J">J Trommershäuser</name>
</author>
<author><name sortKey="Gepshtein, S" uniqKey="Gepshtein S">S Gepshtein</name>
</author>
<author><name sortKey="Maloney, L" uniqKey="Maloney L">L Maloney</name>
</author>
<author><name sortKey="Landy, M" uniqKey="Landy M">M Landy</name>
</author>
<author><name sortKey="Banks, M" uniqKey="Banks M">M Banks</name>
</author>
</analytic>
</biblStruct>
<biblStruct></biblStruct>
<biblStruct><analytic><author><name sortKey="Wichmann, F" uniqKey="Wichmann F">F Wichmann</name>
</author>
<author><name sortKey="Hill, N" uniqKey="Hill N">N Hill</name>
</author>
</analytic>
</biblStruct>
</listBibl>
</div1>
</back>
</TEI>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Ticri/CIDE/explor/HapticV1/Data/Main/Curation
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001A61 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Curation/biblio.hfd -nk 001A61 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Ticri/CIDE |area= HapticV1 |flux= Main |étape= Curation |type= RBID |clé= PMC:3813602 |texte= Knowing Each Random Error of Our Ways, but Hardly Correcting for It: An Instance of Optimal Performance }}
Pour générer des pages wiki
HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Curation/RBID.i -Sk "pubmed:24205308" \ | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Curation/biblio.hfd \ | NlmPubMed2Wicri -a HapticV1
This area was generated with Dilib version V0.6.23. |