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  Supervised and unsupervised learning of multidimensional acoustic categories

Goudbeek, M., Swingley, D., & Smits, R. (2009). Supervised and unsupervised learning of multidimensional acoustic categories. Journal of Experimental Psychology: Human Perception and Performance, 35, 1913-1933. doi:10.1037/a0015781.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-40F7-5 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-40FC-C
Genre: Journal Article

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 Creators:
Goudbeek, Martijn1, 2, 3, Author
Swingley, Daniel4, Author
Smits, Roel1, Author
Affiliations:
1Language Comprehension Group, MPI for Psycholinguistics, Max Planck Society, Nijmegen, NL, ou_55203              
2Phonological Learning for Speech Perception , MPI for Psycholinguistics, Max Planck Society, Nijmegen, NL, ou_55227              
3Geneva Emotion Research Group, University of Geneva, Switzerland
4Department of Psychology, University of Pennsylvania

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 Abstract: Learning to recognize the contrasts of a language-specific phonemic repertoire can be viewed as forming categories in a multidimensional psychophysical space. Research on the learning of distributionally defined visual categories has shown that categories defined over I dimension are easy to learn and that learning multidimensional categories is more difficult but tractable under specific task conditions. In 2 experiments, adult participants learned either a unidimensional ora multidimensional category distinction with or without supervision (feedback) during learning. The unidimensional distinctions were readily learned and supervision proved beneficial, especially in maintaining category learning beyond the learning phase. Learning the multidimensional category distinction proved to be much more difficult and supervision was not nearly as beneficial as with unidimensionally defined categories. Maintaining a learned multidimensional category distinction was only possible when the distributional information (hat identified the categories remained present throughout the testing phase. We conclude that listeners are sensitive to both trial-by-trial feedback and the distributional information in the stimuli. Even given limited exposure, listeners learned to use 2 relevant dimensions. albeit with considerable difficulty.

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Language(s): eng - English
 Dates: 20092009
 Publication Status: Issued
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 Rev. Type: Peer
 Identifiers: DOI: 10.1037/a0015781
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Title: Journal of Experimental Psychology: Human Perception and Performance
Source Genre: Journal
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Publ. Info: American Psychological Association
Pages: - Volume / Issue: 35 Sequence Number: - Start / End Page: 1913 - 1933 Identifier: ISSN: 0096-1523