Target Uncertainty Mediates Sensorimotor Error Correction
Publication Date
January 27, 2017
Authors
Luigi Acerbi, Sethu Vijayakumar & Daniel M. Wolpert
Volume
12
Issue
1
Pages
e0170466
DOI
https://dx.plos.org/10.1371/journal.pone.0170466
Publisher URL
http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0170466
Scopus
85011105495
Mendeley
http://www.mendeley.com/research/target-uncertainty-mediates-sensorimotor-error-correction
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Mendeley | Further Information

{"title"=>"Target Uncertainty Mediates Sensorimotor Error Correction", "type"=>"journal", "authors"=>[{"first_name"=>"Luigi", "last_name"=>"Acerbi", "scopus_author_id"=>"23395837000"}, {"first_name"=>"Sethu", "last_name"=>"Vijayakumar", "scopus_author_id"=>"8854114100"}, {"first_name"=>"Daniel M.", "last_name"=>"Wolpert", "scopus_author_id"=>"35495089500"}], "year"=>2017, "source"=>"PLoS ONE", "identifiers"=>{"issn"=>"19326203", "scopus"=>"2-s2.0-85011105495", "pmid"=>"28129323", "doi"=>"10.1371/journal.pone.0170466", "pui"=>"614221214", "isbn"=>"1111111111", "sgr"=>"85011105495"}, "id"=>"2433ad8a-6ae6-3abb-b7b7-1f6063f2c286", "abstract"=>"Human movements are prone to errors that arise from inaccuracies in both our perceptual processing and execution of motor commands. We can reduce such errors by both improving our estimates of the state of the world and through online error correction of the ongoing action. Two prominent frameworks that explain how humans solve these problems are Bayesian estimation and stochastic optimal feedback control. Here we examine the interaction between estimation and control by asking if uncertainty in estimates affects how subjects correct for errors that may arise during the movement. Unbeknownst to participants, we randomly shifted the visual feedback of their finger position as they reached to indicate the center of mass of an object. Even though participants were given ample time to compensate for this perturbation, they only fully corrected for the induced error on trials with low uncertainty about center of mass, with correction only partial in trials involving more uncertainty. The analysis of subjects’ scores revealed that participants corrected for errors just enough to avoid significant decrease in their overall scores, in agreement with the minimal intervention principle of optimal feedback control. We explain this behavior with a term in the loss function that accounts for the additional effort of adjusting one’s response. By suggesting that subjects’ decision uncertainty, as reflected in their posterior distribution, is a major factor in determining how their sensorimotor system responds to error, our findings support theoretical models in which the decision making and control processes are fully integrated.", "link"=>"http://www.mendeley.com/research/target-uncertainty-mediates-sensorimotor-error-correction", "reader_count"=>46, "reader_count_by_academic_status"=>{"Professor > Associate Professor"=>1, "Student > Doctoral Student"=>4, "Researcher"=>9, "Student > Ph. D. Student"=>14, "Student > Postgraduate"=>3, "Student > Master"=>7, "Other"=>2, "Student > Bachelor"=>3, "Lecturer"=>1, "Professor"=>1, "Unspecified"=>1}, "reader_count_by_user_role"=>{"Professor > Associate Professor"=>1, "Student > Doctoral Student"=>4, "Researcher"=>9, "Student > Ph. D. Student"=>14, "Student > Postgraduate"=>3, "Student > Master"=>7, "Other"=>2, "Student > Bachelor"=>3, "Lecturer"=>1, "Professor"=>1, "Unspecified"=>1}, "reader_count_by_subject_area"=>{"Engineering"=>3, "Nursing and Health Professions"=>1, "Medicine and Dentistry"=>2, "Agricultural and Biological Sciences"=>1, "Neuroscience"=>14, "Pharmacology, Toxicology and Pharmaceutical Science"=>1, "Psychology"=>18, "Computer Science"=>4, "Unspecified"=>1, "Social Sciences"=>1}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>3}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>2}, "Neuroscience"=>{"Neuroscience"=>14}, "Social Sciences"=>{"Social Sciences"=>1}, "Psychology"=>{"Psychology"=>18}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>1}, "Computer Science"=>{"Computer Science"=>4}, "Nursing and Health Professions"=>{"Nursing and Health Professions"=>1}, "Pharmacology, Toxicology and Pharmaceutical Science"=>{"Pharmacology, Toxicology and Pharmaceutical Science"=>1}, "Unspecified"=>{"Unspecified"=>1}}, "reader_count_by_country"=>{"Belgium"=>1, "United States"=>1, "United Kingdom"=>1}, "group_count"=>0}

Scopus | Further Information

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