Short-Term Visual Deprivation Does Not Enhance Passive Tactile Spatial Acuity
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{"title"=>"Short-term visual deprivation does not enhance passive tactile spatial acuity", "type"=>"journal", "authors"=>[{"first_name"=>"Michael", "last_name"=>"Wong", "scopus_author_id"=>"39863807200"}, {"first_name"=>"Erik", "last_name"=>"Hackeman", "scopus_author_id"=>"35484107000"}, {"first_name"=>"Caitlin", "last_name"=>"Hurd", "scopus_author_id"=>"53864773900"}, {"first_name"=>"Daniel", "last_name"=>"Goldreich", "scopus_author_id"=>"6603038680"}], "year"=>2011, "source"=>"PLoS ONE", "identifiers"=>{"scopus"=>"2-s2.0-80053113771", "sgr"=>"80053113771", "issn"=>"19326203", "doi"=>"10.1371/journal.pone.0025277", "pmid"=>"21966478", "isbn"=>"1932-6203 (Electronic) 1932-6203 (Linking)", "pui"=>"362619287"}, "id"=>"5351e65d-a25c-36a2-bb42-14d4b7a81f47", "abstract"=>"An important unresolved question in sensory neuroscience is whether, and if so with what time course, tactile perception is enhanced by visual deprivation. In three experiments involving 158 normally sighted human participants, we assessed whether tactile spatial acuity improves with short-term visual deprivation over periods ranging from under 10 to over 110 minutes. We used an automated, precisely controlled two-interval forced-choice grating orientation task to assess each participant's ability to discern the orientation of square-wave gratings pressed against the stationary index finger pad of the dominant hand. A two-down one-up staircase (Experiment 1) or a Bayesian adaptive procedure (Experiments 2 and 3) was used to determine the groove width of the grating whose orientation each participant could reliably discriminate. The experiments consistently showed that tactile grating orientation discrimination does not improve with short-term visual deprivation. In fact, we found that tactile performance degraded slightly but significantly upon a brief period of visual deprivation (Experiment 1) and did not improve over periods of up to 110 minutes of deprivation (Experiments 2 and 3). The results additionally showed that grating orientation discrimination tends to improve upon repeated testing, and confirmed that women significantly outperform men on the grating orientation task. We conclude that, contrary to two recent reports but consistent with an earlier literature, passive tactile spatial acuity is not enhanced by short-term visual deprivation. Our findings have important theoretical and practical implications. On the theoretical side, the findings set limits on the time course over which neural mechanisms such as crossmodal plasticity may operate to drive sensory changes; on the practical side, the findings suggest that researchers who compare tactile acuity of blind and sighted participants should not blindfold the sighted participants.", "link"=>"http://www.mendeley.com/research/shortterm-visual-deprivation-not-enhance-passive-tactile-spatial-acuity", "reader_count"=>36, "reader_count_by_academic_status"=>{"Unspecified"=>1, "Student > Doctoral Student"=>2, "Researcher"=>10, "Student > Ph. D. Student"=>11, "Student > Postgraduate"=>3, "Student > Master"=>4, "Student > Bachelor"=>2, "Lecturer"=>2, "Lecturer > Senior Lecturer"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>1, "Student > Doctoral Student"=>2, "Researcher"=>10, "Student > Ph. D. Student"=>11, "Student > Postgraduate"=>3, "Student > Master"=>4, "Student > Bachelor"=>2, "Lecturer"=>2, "Lecturer > Senior Lecturer"=>1}, "reader_count_by_subject_area"=>{"Engineering"=>2, "Unspecified"=>6, "Agricultural and Biological Sciences"=>5, "Medicine and Dentistry"=>6, "Neuroscience"=>3, "Physics and Astronomy"=>1, "Psychology"=>12, "Social Sciences"=>1}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>2}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>6}, "Neuroscience"=>{"Neuroscience"=>3}, "Social Sciences"=>{"Social Sciences"=>1}, "Physics and Astronomy"=>{"Physics and Astronomy"=>1}, "Psychology"=>{"Psychology"=>12}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>5}, "Unspecified"=>{"Unspecified"=>6}}, "group_count"=>0}

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/369605"], "description"=>"<div><p>An important unresolved question in sensory neuroscience is whether, and if so with what time course, tactile perception is enhanced by visual deprivation. In three experiments involving 158 normally sighted human participants, we assessed whether tactile spatial acuity improves with short-term visual deprivation over periods ranging from under 10 to over 110 minutes. We used an automated, precisely controlled two-interval forced-choice grating orientation task to assess each participant's ability to discern the orientation of square-wave gratings pressed against the stationary index finger pad of the dominant hand. A two-down one-up staircase (Experiment 1) or a Bayesian adaptive procedure (Experiments 2 and 3) was used to determine the groove width of the grating whose orientation each participant could reliably discriminate. The experiments consistently showed that tactile grating orientation discrimination does not improve with short-term visual deprivation. In fact, we found that tactile performance degraded slightly but significantly upon a brief period of visual deprivation (Experiment 1) and did not improve over periods of up to 110 minutes of deprivation (Experiments 2 and 3). The results additionally showed that grating orientation discrimination tends to improve upon repeated testing, and confirmed that women significantly outperform men on the grating orientation task. We conclude that, contrary to two recent reports but consistent with an earlier literature, passive tactile spatial acuity is not enhanced by short-term visual deprivation. Our findings have important theoretical and practical implications. On the theoretical side, the findings set limits on the time course over which neural mechanisms such as crossmodal plasticity may operate to drive sensory changes; on the practical side, the findings suggest that researchers who compare tactile acuity of blind and sighted participants should not blindfold the sighted participants.</p> </div>", "links"=>[], "tags"=>["deprivation", "passive", "tactile", "spatial", "acuity"], "article_id"=>133037, "categories"=>["Neuroscience"], "users"=>["Michael Wong", "Erik Hackeman", "Caitlin Hurd", "Daniel Goldreich"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0025277"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Short_Term_Visual_Deprivation_Does_Not_Enhance_Passive_Tactile_Spatial_Acuity/133037", "title"=>"Short-Term Visual Deprivation Does Not Enhance Passive Tactile Spatial Acuity", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2011-09-23 00:50:37"}
  • {"files"=>["https://ndownloader.figshare.com/files/731179"], "description"=>"<p>A. Participants were seated upright with their tested hand resting in prone position on a tabletop. In Experiments 2 and 3, a box occluded the participant's tested hand from view. B. In each trial, a grating stimulus contacted the tested finger pad twice, once with the gratings aligned vertically, and once with the gratings aligned horizontally. The images in A and B are not drawn to scale.</p>", "links"=>[], "tags"=>["neuroscience"], "article_id"=>401540, "categories"=>["Neuroscience"], "users"=>["Michael Wong", "Erik Hackeman", "Caitlin Hurd", "Daniel Goldreich"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0025277.g001"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Grating_orientation_task_GOT_/401540", "title"=>"Grating orientation task (GOT).", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2011-09-23 00:25:40"}
  • {"files"=>["https://ndownloader.figshare.com/files/731259"], "description"=>"<p>In a two-by-two repeated measures design, every participant was tested under four conditions: two conditions of ambient lighting (dark and light) by two conditions of eyelid state (eyes opened and eyes closed). Each participant completed the four conditions twice. The experiment duration was approximately 80 minutes.</p>", "links"=>[], "tags"=>["neuroscience"], "article_id"=>401620, "categories"=>["Neuroscience"], "users"=>["Michael Wong", "Erik Hackeman", "Caitlin Hurd", "Daniel Goldreich"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0025277.g002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Experiment_1_conditions_/401620", "title"=>"Experiment 1 conditions.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2011-09-23 00:27:00"}
  • {"files"=>["https://ndownloader.figshare.com/files/731303"], "description"=>"<p>A, Participants' mean 70.71% thresholds are shown for the two conditions of ambient lighting (pitch-darkness, left; indoor fluorescent lighting, right) and eyelid state (eyes closed, filled squares; eyes opened, open squares). The solid lines connecting the symbols illustrate the effect of ambient lighting. Errors bars represent 1 SEM; the error bars on upper and lower symbols are displaced in opposite directions for visual clarity. B, Participants' mean 70.71% thresholds are plotted for each condition in the first and second iterations separately (darkness with eyes closed, DC; light with eyes closed, LC; darkness with eyes opened, DO; light with eyes opened, LO). Data in (A) and (B) are from 46 participants.</p>", "links"=>[], "tags"=>["neuroscience"], "article_id"=>401663, "categories"=>["Neuroscience"], "users"=>["Michael Wong", "Erik Hackeman", "Caitlin Hurd", "Daniel Goldreich"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0025277.g003"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Experiment_1_data_/401663", "title"=>"Experiment 1 data.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2011-09-23 00:27:43"}
  • {"files"=>["https://ndownloader.figshare.com/files/731362"], "description"=>"<p>One group of non-deprived and three groups of visually deprived participants were tested on the GOT (white squares). In the passively stimulated group, participants received grating stimuli that they were not required to discriminate (blue squares). Blocks were separated by 8-minute rest periods (short horizontal lines). The shaded rectangle indicates the period of visual deprivation. The experiment duration was approximately 170 minutes.</p>", "links"=>[], "tags"=>["neuroscience"], "article_id"=>401724, "categories"=>["Neuroscience"], "users"=>["Michael Wong", "Erik Hackeman", "Caitlin Hurd", "Daniel Goldreich"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0025277.g004"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Experiment_2_conditions_/401724", "title"=>"Experiment 2 conditions.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2011-09-23 00:28:44"}
  • {"files"=>["https://ndownloader.figshare.com/files/731477"], "description"=>"<p>GOT performance (mean 76% threshold) of the four groups (n = 10 participants per group): A, non-deprived. B, repeatedly tested. C, passively stimulated. D, unstimulated. The shaded rectangles in B–D delineate the visual deprivation period. Errors bars represent ±1 SEM.</p>", "links"=>[], "tags"=>["neuroscience"], "article_id"=>401835, "categories"=>["Neuroscience"], "users"=>["Michael Wong", "Erik Hackeman", "Caitlin Hurd", "Daniel Goldreich"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0025277.g005"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Experiment_2_data_/401835", "title"=>"Experiment 2 data.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2011-09-23 00:30:35"}
  • {"files"=>["https://ndownloader.figshare.com/files/731660"], "description"=>"<p>A non-deprived group and a visually deprived group of participants were tested three times on the GOT (white squares). A 110-minute conversation period separated the first and second tests, and a 120-minute break separated the second and third tests. The shaded rectangle indicates the period of visual deprivation. The experiment duration was approximately 260 minutes.</p>", "links"=>[], "tags"=>["neuroscience"], "article_id"=>402019, "categories"=>["Neuroscience"], "users"=>["Michael Wong", "Erik Hackeman", "Caitlin Hurd", "Daniel Goldreich"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0025277.g006"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Experiment_3_conditions_/402019", "title"=>"Experiment 3 conditions.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2011-09-23 00:33:39"}
  • {"files"=>["https://ndownloader.figshare.com/files/731708"], "description"=>"<p>GOT performance (mean 76% threshold) of the two groups: A, non-deprived (n = 29 participants). B, visually deprived (n = 32 participants). The shaded rectangle in B delineates the visual deprivation period. Error bars represent ±1 SEM.</p>", "links"=>[], "tags"=>["neuroscience"], "article_id"=>402065, "categories"=>["Neuroscience"], "users"=>["Michael Wong", "Erik Hackeman", "Caitlin Hurd", "Daniel Goldreich"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0025277.g007"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Experiment_3_data_/402065", "title"=>"Experiment 3 data.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2011-09-23 00:34:25"}
  • {"files"=>["https://ndownloader.figshare.com/files/731784"], "description"=>"<p>*Statistically significant improvement. For a review of the early studies, see Zubek et al. <a href=\"http://www.plosone.org/article/info:doi/10.1371/journal.pone.0025277#pone.0025277-Zubek4\" target=\"_blank\">[52]</a>.</p>", "links"=>[], "tags"=>["deprivation", "studies"], "article_id"=>402141, "categories"=>["Neuroscience"], "users"=>["Michael Wong", "Erik Hackeman", "Caitlin Hurd", "Daniel Goldreich"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0025277.t001"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Summary_of_visual_multisensory_deprivation_studies_since_1959_/402141", "title"=>"Summary of visual/multisensory deprivation studies since 1959.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2011-09-23 00:35:41"}

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Relative Metric

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