Haptic categorical perception of shape.
Categorization and categorical perception have been extensively studied, mainly in vision and audition. In the haptic domain, our ability to categorize objects has also been demonstrated in earlier studies. Here we show for the first time that categorical perception also occurs in haptic shape perce...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2012-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC3416786?pdf=render |
| _version_ | 1818025763995123712 |
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| author | Nina Gaißert Steffen Waterkamp Roland W Fleming Isabelle Bülthoff |
| author_facet | Nina Gaißert Steffen Waterkamp Roland W Fleming Isabelle Bülthoff |
| author_sort | Nina Gaißert |
| collection | DOAJ |
| description | Categorization and categorical perception have been extensively studied, mainly in vision and audition. In the haptic domain, our ability to categorize objects has also been demonstrated in earlier studies. Here we show for the first time that categorical perception also occurs in haptic shape perception. We generated a continuum of complex shapes by morphing between two volumetric objects. Using similarity ratings and multidimensional scaling we ensured that participants could haptically discriminate all objects equally. Next, we performed classification and discrimination tasks. After a short training with the two shape categories, both tasks revealed categorical perception effects. Training leads to between-category expansion resulting in higher discriminability of physical differences between pairs of stimuli straddling the category boundary. Thus, even brief training can alter haptic representations of shape. This suggests that the weights attached to various haptic shape features can be changed dynamically in response to top-down information about class membership. |
| first_indexed | 2024-12-10T04:21:17Z |
| format | Article |
| id | doaj.art-78eb1df0dc434bf8ad12f22509486f00 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-10T04:21:17Z |
| publishDate | 2012-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-78eb1df0dc434bf8ad12f22509486f002022-12-22T02:02:25ZengPublic Library of Science (PLoS)PLoS ONE1932-62032012-01-0178e4306210.1371/journal.pone.0043062Haptic categorical perception of shape.Nina GaißertSteffen WaterkampRoland W FlemingIsabelle BülthoffCategorization and categorical perception have been extensively studied, mainly in vision and audition. In the haptic domain, our ability to categorize objects has also been demonstrated in earlier studies. Here we show for the first time that categorical perception also occurs in haptic shape perception. We generated a continuum of complex shapes by morphing between two volumetric objects. Using similarity ratings and multidimensional scaling we ensured that participants could haptically discriminate all objects equally. Next, we performed classification and discrimination tasks. After a short training with the two shape categories, both tasks revealed categorical perception effects. Training leads to between-category expansion resulting in higher discriminability of physical differences between pairs of stimuli straddling the category boundary. Thus, even brief training can alter haptic representations of shape. This suggests that the weights attached to various haptic shape features can be changed dynamically in response to top-down information about class membership.http://europepmc.org/articles/PMC3416786?pdf=render |
| spellingShingle | Nina Gaißert Steffen Waterkamp Roland W Fleming Isabelle Bülthoff Haptic categorical perception of shape. PLoS ONE |
| title | Haptic categorical perception of shape. |
| title_full | Haptic categorical perception of shape. |
| title_fullStr | Haptic categorical perception of shape. |
| title_full_unstemmed | Haptic categorical perception of shape. |
| title_short | Haptic categorical perception of shape. |
| title_sort | haptic categorical perception of shape |
| url | http://europepmc.org/articles/PMC3416786?pdf=render |
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