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Gepubliceerd in: Journal of Autism and Developmental Disorders 3/2007

01-03-2007 | Original Paper

Atypical Categorical Perception in Autism: Autonomy of Discrimination?

Auteurs: Isabelle Soulières, Laurent Mottron, Daniel Saumier, Serge Larochelle

Gepubliceerd in: Journal of Autism and Developmental Disorders | Uitgave 3/2007

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Abstract

A diminished top-down influence has been proposed in autism, to account for enhanced performance in low-level perceptual tasks. Applied to perceptual categorization, this hypothesis predicts a diminished influence of category on discrimination. In order to test this hypothesis, we compared categorical perception in 16 individuals with and 16 individuals without high-functioning autism. While participants with and without autism displayed a typical classification curve, there was no facilitation of discrimination near the category boundary in the autism group. The absence of influence of categorical knowledge on discrimination suggests an increased autonomy of low-level perceptual processes in autism, in the form of a reduced top-down influence from categories toward discrimination.
Voetnoten
1
This interpretation has been suggested to us by Michelle Dawson, an autistic researcher
 
Literatuur
go back to reference Aldrich, J. H., & Nelson, F. D. (1984). Linear probability, logit, and probit models. Beverly Hills: Sage Publications. Aldrich, J. H., & Nelson, F. D. (1984). Linear probability, logit, and probit models. Beverly Hills: Sage Publications.
go back to reference Ashby, F. G., Alfonso-Reese, L. A., Turken, A. U., & Waldron, A. M. (1998). A neuropsychological theory of multiple systems in category learning. Psychological Review, 105, 442–481.PubMedCrossRef Ashby, F. G., Alfonso-Reese, L. A., Turken, A. U., & Waldron, A. M. (1998). A neuropsychological theory of multiple systems in category learning. Psychological Review, 105, 442–481.PubMedCrossRef
go back to reference Bar, M. (2003). A cortical mechanism for triggering top-down facilitation in visual object recognition. Journal of Cognitive Neuroscience, 15, 600–609.PubMedCrossRef Bar, M. (2003). A cortical mechanism for triggering top-down facilitation in visual object recognition. Journal of Cognitive Neuroscience, 15, 600–609.PubMedCrossRef
go back to reference Bonnel, A. C., Mottron, L., Peretz, I., Trudel, M., Gallun, E., & Bonnel, A. M. (2003). Enhanced pitch sensitivity in individuals with autism: A signal detection analysis. Journal of Cognitive Neuroscience, 15, 226–235.PubMedCrossRef Bonnel, A. C., Mottron, L., Peretz, I., Trudel, M., Gallun, E., & Bonnel, A. M. (2003). Enhanced pitch sensitivity in individuals with autism: A signal detection analysis. Journal of Cognitive Neuroscience, 15, 226–235.PubMedCrossRef
go back to reference Bornstein, M. H., & Korda, N. O. (1984). Discrimination and matching within and between hues measured by reaction times: Some implications for categorical perception and levels of information processing. Psychological Research, 46, 207–222.PubMedCrossRef Bornstein, M. H., & Korda, N. O. (1984). Discrimination and matching within and between hues measured by reaction times: Some implications for categorical perception and levels of information processing. Psychological Research, 46, 207–222.PubMedCrossRef
go back to reference Bowler, D. M., Matthews, N. J., & Gardiner, J. M. (1997). Asperger’s syndrome and memory: Similarity to autism but not amnesia. Neuropsychologia, 35, 65–70.PubMedCrossRef Bowler, D. M., Matthews, N. J., & Gardiner, J. M. (1997). Asperger’s syndrome and memory: Similarity to autism but not amnesia. Neuropsychologia, 35, 65–70.PubMedCrossRef
go back to reference Bruner, J. S., Goodnow, J. J., & Austin, G. A. (1956). A study of thinking. Oxford, England: John Wiley & Sons. Bruner, J. S., Goodnow, J. J., & Austin, G. A. (1956). A study of thinking. Oxford, England: John Wiley & Sons.
go back to reference Bülthoff, I., & Newell, F. N. (2004). Categorical perception of sex occurs in familiar but not unfamiliar faces. Visual Cognition, 11, 823–855.CrossRef Bülthoff, I., & Newell, F. N. (2004). Categorical perception of sex occurs in familiar but not unfamiliar faces. Visual Cognition, 11, 823–855.CrossRef
go back to reference Calder, A. J., Young, A. W., Perrett, D. I., Etcoff, N. L., & Rowland, D. (1996). Categorical perception of morphed facial expressions. Visual Cognition, 3, 81–117. Calder, A. J., Young, A. W., Perrett, D. I., Etcoff, N. L., & Rowland, D. (1996). Categorical perception of morphed facial expressions. Visual Cognition, 3, 81–117.
go back to reference Casanova, M. F., Buxhoeveden, D, & Gomez, J. (2003). Disruption in the inhibitory architecture of the cell minicolumn: implications for autism. Neuroscientist, 9, 496–507.PubMedCrossRef Casanova, M. F., Buxhoeveden, D, & Gomez, J. (2003). Disruption in the inhibitory architecture of the cell minicolumn: implications for autism. Neuroscientist, 9, 496–507.PubMedCrossRef
go back to reference Cienfuegos, A., March, L., Shelley, A.-M., & Javitt, D. C. (1999). Impaired categorical perception of synthetic speech sounds in schizophrenia. Biological Psychiatry, 45, 82–88.PubMedCrossRef Cienfuegos, A., March, L., Shelley, A.-M., & Javitt, D. C. (1999). Impaired categorical perception of synthetic speech sounds in schizophrenia. Biological Psychiatry, 45, 82–88.PubMedCrossRef
go back to reference Collins, A. M., & Quillian, M. R. (1969). Retrieval time from semantic memory. Journal of Verbal Learning & Verbal Behavior, 8, 240–247.CrossRef Collins, A. M., & Quillian, M. R. (1969). Retrieval time from semantic memory. Journal of Verbal Learning & Verbal Behavior, 8, 240–247.CrossRef
go back to reference Erickson, M. A., & Kruschke, J. K. (1998). Rules and exemplars in category learning. Journal of Experimental Psychology: General, 127, 107–140.CrossRef Erickson, M. A., & Kruschke, J. K. (1998). Rules and exemplars in category learning. Journal of Experimental Psychology: General, 127, 107–140.CrossRef
go back to reference Etcoff, N. L., & Magee, J. J. (1992). Categorical perception of facial expressions. Cognition, 44, 227–240.PubMedCrossRef Etcoff, N. L., & Magee, J. J. (1992). Categorical perception of facial expressions. Cognition, 44, 227–240.PubMedCrossRef
go back to reference Frith, C. (2003). What do imaging studies tell us about the neural basis of autism? Novartis Foundation Symposium, 251, 149–166.PubMed Frith, C. (2003). What do imaging studies tell us about the neural basis of autism? Novartis Foundation Symposium, 251, 149–166.PubMed
go back to reference Frith, U. (2003). Autism: Explaining the enigma. (2nd edition). Malden, MA: Blackwell Publishers. Frith, U. (2003). Autism: Explaining the enigma. (2nd edition). Malden, MA: Blackwell Publishers.
go back to reference Frith, U., & Snowling, M. (1983). Reading for meaning and reading for sound in autistic and dyslexic children. Journal of Developmental Psychology, 1, 329–342. Frith, U., & Snowling, M. (1983). Reading for meaning and reading for sound in autistic and dyslexic children. Journal of Developmental Psychology, 1, 329–342.
go back to reference Green, D. M., & Swets, J. A. (1966). Signal detection theory and psychophysics. New York: Wiley. Green, D. M., & Swets, J. A. (1966). Signal detection theory and psychophysics. New York: Wiley.
go back to reference Grossberg, S. (1999). The link between brain learning, attention, and consciousness. Consciousness and Cognition, 8, 1–44.PubMedCrossRef Grossberg, S. (1999). The link between brain learning, attention, and consciousness. Consciousness and Cognition, 8, 1–44.PubMedCrossRef
go back to reference Happé, F. (1997). Central coherence and theory of mind: Reading homographs in context. British Journal of Developmental Psychology, 15, 1–12. Happé, F. (1997). Central coherence and theory of mind: Reading homographs in context. British Journal of Developmental Psychology, 15, 1–12.
go back to reference Harnad, S. (1987). Categorical perception: The groundwork of cognition. New York: Cambridge University Press. Harnad, S. (1987). Categorical perception: The groundwork of cognition. New York: Cambridge University Press.
go back to reference Harnad, S. (2003). Categorical perception. Encyclopedia of Cognitive Science. Nature Publishing group/Macmillan. Harnad, S. (2003). Categorical perception. Encyclopedia of Cognitive Science. Nature Publishing group/Macmillan.
go back to reference Hermelin, B., & O’Connor, N. (1970). Psychological experiments with autistic children. Oxford: Pergamon Press. Hermelin, B., & O’Connor, N. (1970). Psychological experiments with autistic children. Oxford: Pergamon Press.
go back to reference Joliffe, T., & Baron-Cohen, S. (1999). A test of central coherence theory: linguistic processing in high-functioning adults with autism or Asperger’s syndrome: Is local coherence impaired?. Cognition, 71, 149–185.CrossRef Joliffe, T., & Baron-Cohen, S. (1999). A test of central coherence theory: linguistic processing in high-functioning adults with autism or Asperger’s syndrome: Is local coherence impaired?. Cognition, 71, 149–185.CrossRef
go back to reference Just, M. A., Cherkassky, V. L., Keller, T. A., & Minshew, N. J. (2004). Cortical activation and synchronization during sentence comprehension in high-functioning autism: evidence of underconnectivity. Brain, 127, 1811–1821.PubMedCrossRef Just, M. A., Cherkassky, V. L., Keller, T. A., & Minshew, N. J. (2004). Cortical activation and synchronization during sentence comprehension in high-functioning autism: evidence of underconnectivity. Brain, 127, 1811–1821.PubMedCrossRef
go back to reference Klinger, L. G., & Dawson, G. (2001). Prototype formation in autism. Development and Psychopathology, 13, 111–124.PubMedCrossRef Klinger, L. G., & Dawson, G. (2001). Prototype formation in autism. Development and Psychopathology, 13, 111–124.PubMedCrossRef
go back to reference Koshino, H., Carpenter, P. A., Minshew, N. J., Cherkassky, V. L., Keller, T. A., & Just, M. A. (2005). Functional connectivity in an fMRI working memory task in high-functioning autism. Neuroimage, 24, 810–21.PubMedCrossRef Koshino, H., Carpenter, P. A., Minshew, N. J., Cherkassky, V. L., Keller, T. A., & Just, M. A. (2005). Functional connectivity in an fMRI working memory task in high-functioning autism. Neuroimage, 24, 810–21.PubMedCrossRef
go back to reference Kugler, B. T., & Caudrey, D. J. (1983). Phoneme discrimination in schizophrenia. British Journal of Psychiatry, 142, 53–59.PubMedCrossRef Kugler, B. T., & Caudrey, D. J. (1983). Phoneme discrimination in schizophrenia. British Journal of Psychiatry, 142, 53–59.PubMedCrossRef
go back to reference Kuhl, P. K., & Padden, D. M. (1982). Enhanced discriminability at the phonetic boundaries for the voicing feature in macaques. Perception & Psychophysics, 32, 542–550. Kuhl, P. K., & Padden, D. M. (1982). Enhanced discriminability at the phonetic boundaries for the voicing feature in macaques. Perception & Psychophysics, 32, 542–550.
go back to reference Levin, D. T., & Beale, J. M. (2000). Categorical perception occurs in newly learned faces, other-race faces, and inverted faces. Perception and psychophysics, 62, 386–401.PubMed Levin, D. T., & Beale, J. M. (2000). Categorical perception occurs in newly learned faces, other-race faces, and inverted faces. Perception and psychophysics, 62, 386–401.PubMed
go back to reference Liberman, A. M. (1996). Speech: A special code. Cambridge, MA: MIT Press. Liberman, A. M. (1996). Speech: A special code. Cambridge, MA: MIT Press.
go back to reference Liberman, A. M., Harris, K. S., Hoffman, H. S., & Griffith, B. C. (1957). The discrimination of speech sounds within and across phoneme boundaries. Journal of Experimental Psychology, 54, 358–368.PubMedCrossRef Liberman, A. M., Harris, K. S., Hoffman, H. S., & Griffith, B. C. (1957). The discrimination of speech sounds within and across phoneme boundaries. Journal of Experimental Psychology, 54, 358–368.PubMedCrossRef
go back to reference Lopez, B., & Leekam, S. R. (2003). Do children with autism fail to process information in context. Journal of Child Psychology and Psychiatry, 44, 285–300.PubMedCrossRef Lopez, B., & Leekam, S. R. (2003). Do children with autism fail to process information in context. Journal of Child Psychology and Psychiatry, 44, 285–300.PubMedCrossRef
go back to reference Lord, C., Risi, S., Lambrecht, L., Cook, E. H. Jr, Leventhal, B. L., DiLavore, P. C. et al. (2000). The autism diagnostic observation schedule-generic: A standard measure of social and communication deficits associated with the spectrum of autism. Journal of Autism and Developmental Disorders, 30, 205–223.PubMedCrossRef Lord, C., Risi, S., Lambrecht, L., Cook, E. H. Jr, Leventhal, B. L., DiLavore, P. C. et al. (2000). The autism diagnostic observation schedule-generic: A standard measure of social and communication deficits associated with the spectrum of autism. Journal of Autism and Developmental Disorders, 30, 205–223.PubMedCrossRef
go back to reference Lord, C., Rutter, M., & Le Couteur, A. (1994). Autism diagnosis interview-revised: A revised version of a diagnostic interview for caregivers of individuals with possible pervasive developmental disorders. Journal of Autism and Developmental Disorders, 24, 659–685.PubMedCrossRef Lord, C., Rutter, M., & Le Couteur, A. (1994). Autism diagnosis interview-revised: A revised version of a diagnostic interview for caregivers of individuals with possible pervasive developmental disorders. Journal of Autism and Developmental Disorders, 24, 659–685.PubMedCrossRef
go back to reference Macmillan, N. A., & Creelman, C. D. (1991). Detection theory: A user’s guide. Cambridge: Cambridge University Press. Macmillan, N. A., & Creelman, C. D. (1991). Detection theory: A user’s guide. Cambridge: Cambridge University Press.
go back to reference Medin, D. L., & Schaffer, M. (1978). Context theory of classification learning. Psychological Review, 85, 207–238.CrossRef Medin, D. L., & Schaffer, M. (1978). Context theory of classification learning. Psychological Review, 85, 207–238.CrossRef
go back to reference Medin, D. L., & Smith, E. E. (1984). Concepts and concept formation. Annual Review of Psychology, 35, 113–138.CrossRef Medin, D. L., & Smith, E. E. (1984). Concepts and concept formation. Annual Review of Psychology, 35, 113–138.CrossRef
go back to reference Moleswoth, C. J., Bowler, D. M., & Hampton, J. A. (2005). The prototype effect in recognition memory: Intact in autism? Journal of Child Psychology and Psychiatry, 46, 661–672.CrossRef Moleswoth, C. J., Bowler, D. M., & Hampton, J. A. (2005). The prototype effect in recognition memory: Intact in autism? Journal of Child Psychology and Psychiatry, 46, 661–672.CrossRef
go back to reference Mottron, L., & Burack, J. A. (2001). Enhanced perceptual functioning in the development of autism. In J. A. Burack, T. Charman, N. Yirmiya, & P. R. Zelazo, (Eds), The development of autism: Perspectives from theory and research. (pp. 131–148). Mahwah, NJ: Lawrence Erlbaum Associates. Mottron, L., & Burack, J. A. (2001). Enhanced perceptual functioning in the development of autism. In J. A. Burack, T. Charman, N. Yirmiya, & P. R. Zelazo, (Eds), The development of autism: Perspectives from theory and research. (pp. 131–148). Mahwah, NJ: Lawrence Erlbaum Associates.
go back to reference Mottron, L., Burack, J. A., Iarocci, G., Belleville, S., & Enns, J. T. (2003). Locally oriented perception and intact global processing among adolescents with high-functioning autism: evidence from multiple paradigms. Journal of Child Psychology and Psychiatry, 44, 1–10.CrossRef Mottron, L., Burack, J. A., Iarocci, G., Belleville, S., & Enns, J. T. (2003). Locally oriented perception and intact global processing among adolescents with high-functioning autism: evidence from multiple paradigms. Journal of Child Psychology and Psychiatry, 44, 1–10.CrossRef
go back to reference Mottron, L., Morasse, K., & Belleville, S. (2001). A study of memory functioning in individuals with autism. Journal of Child Psychology and Psychiatry, 42, 253–260.PubMedCrossRef Mottron, L., Morasse, K., & Belleville, S. (2001). A study of memory functioning in individuals with autism. Journal of Child Psychology and Psychiatry, 42, 253–260.PubMedCrossRef
go back to reference Newell, F. N., & Bülthoff, H. H. (2002). Categorical perception of familiar objects. Cognition, 85, 113–143.PubMedCrossRef Newell, F. N., & Bülthoff, H. H. (2002). Categorical perception of familiar objects. Cognition, 85, 113–143.PubMedCrossRef
go back to reference Nosofsky, R. M., & Johansen, M. K. (2000). Exemplar-based accounts of “multiple-system” phenomena in perceptual categorization. Psychonomic Bulletin & Review, 7, 375–402. Nosofsky, R. M., & Johansen, M. K. (2000). Exemplar-based accounts of “multiple-system” phenomena in perceptual categorization. Psychonomic Bulletin & Review, 7, 375–402.
go back to reference Nosofsky, R. M. (1986). Attention, similarity, and the identification categorization relationship. Journal of Experimental Psychology: General, 115, 39–57.CrossRef Nosofsky, R. M. (1986). Attention, similarity, and the identification categorization relationship. Journal of Experimental Psychology: General, 115, 39–57.CrossRef
go back to reference O’Riordan, M. A., & Plaisted, K. (2001). Enhanced discrimination in autism. The Quarterly Journal of experimental psychology, 54A, 961–979. O’Riordan, M. A., & Plaisted, K. (2001). Enhanced discrimination in autism. The Quarterly Journal of experimental psychology, 54A, 961–979.
go back to reference Pevtzow, R., & Harnad, S. (1997). Warping similarity space in category learning by human subjects: The role of task difficulty. In M. Ramscar, U. Hahn, E. Cambouropolos, & H. Pain (Eds), Proceedings of SimCat 1997: Interdisciplinary Workshop on Similarity and Categorization. (pp. 189–195). Department of Artificial Intelligence, Edinburgh University. Pevtzow, R., & Harnad, S. (1997). Warping similarity space in category learning by human subjects: The role of task difficulty. In M. Ramscar, U. Hahn, E. Cambouropolos, & H. Pain (Eds), Proceedings of SimCat 1997: Interdisciplinary Workshop on Similarity and Categorization. (pp. 189–195). Department of Artificial Intelligence, Edinburgh University.
go back to reference Plaisted, K. (2001). Reduced generalization: An alternative to weak central coherence. In J. A. Burack, T. Charman, N. Yirmiya, & P. R. Zelazo, (Eds), The development of autism: Perspectives from theory and research. (pp. 149–169). Mahwah, NJ: Lawrence Erlbaum Associates. Plaisted, K. (2001). Reduced generalization: An alternative to weak central coherence. In J. A. Burack, T. Charman, N. Yirmiya, & P. R. Zelazo, (Eds), The development of autism: Perspectives from theory and research. (pp. 149–169). Mahwah, NJ: Lawrence Erlbaum Associates.
go back to reference Plaisted, K., O’Riordan, M., & Baron-Cohen, S. (1998). Enhanced discrimination of novel, highly similar stimuli by adults with autism during a perceptual learning task. Journal of Child Psychology and Psychiatry, 39, 765–775.PubMedCrossRef Plaisted, K., O’Riordan, M., & Baron-Cohen, S. (1998). Enhanced discrimination of novel, highly similar stimuli by adults with autism during a perceptual learning task. Journal of Child Psychology and Psychiatry, 39, 765–775.PubMedCrossRef
go back to reference Quinn, P. (2004). Visual perception of orientation is categorical near vertical and continuous near horizontal. Perception, 33, 897–906.PubMedCrossRef Quinn, P. (2004). Visual perception of orientation is categorical near vertical and continuous near horizontal. Perception, 33, 897–906.PubMedCrossRef
go back to reference Ropar, D., & Mitchell, P. (2002). Shape constancy in autism: The role of prior knowledge and perspective cues. Journal of Child Psychology and Psychiatry, 43(5), 647–653.PubMedCrossRef Ropar, D., & Mitchell, P. (2002). Shape constancy in autism: The role of prior knowledge and perspective cues. Journal of Child Psychology and Psychiatry, 43(5), 647–653.PubMedCrossRef
go back to reference Rosch, E. (1975a). Cognitive representations of semantic categories. Journal of Experimental Psychology: General, 104, 192–233.CrossRef Rosch, E. (1975a). Cognitive representations of semantic categories. Journal of Experimental Psychology: General, 104, 192–233.CrossRef
go back to reference Rosch, E. (1975b). Cognitive reference points. Cognitive Psychology, 7, 532–547.CrossRef Rosch, E. (1975b). Cognitive reference points. Cognitive Psychology, 7, 532–547.CrossRef
go back to reference Rosch, E., & Mervis, C. B. (1975). Family resemblances: Studies in the internal structure of categories. Cognitive Psychology, 7, 573–605.CrossRef Rosch, E., & Mervis, C. B. (1975). Family resemblances: Studies in the internal structure of categories. Cognitive Psychology, 7, 573–605.CrossRef
go back to reference Rossion, B., Schiltz, C., Robaye, L., Pirenne, D., & Crommelinck, M. (2001). How does the brain discriminate familiar and unfamiliar faces?: A PET Study of face categorical perception. Journal of Cognitive Neuroscience, 13, 1019–1034.PubMedCrossRef Rossion, B., Schiltz, C., Robaye, L., Pirenne, D., & Crommelinck, M. (2001). How does the brain discriminate familiar and unfamiliar faces?: A PET Study of face categorical perception. Journal of Cognitive Neuroscience, 13, 1019–1034.PubMedCrossRef
go back to reference Saumier, D., Chertkow, H., Arguin, M., & Renfrew, J. (in revision). Perceptual categorization in Alzheimer’s disease. Saumier, D., Chertkow, H., Arguin, M., & Renfrew, J. (in revision). Perceptual categorization in Alzheimer’s disease.
go back to reference Saumier, D., Chertkow, H., Arguin, M., & Whatmough, C. (2005). Establishing visual category boundaries between objects: A PET study. Brain & Cognition, 59, 299–302.CrossRef Saumier, D., Chertkow, H., Arguin, M., & Whatmough, C. (2005). Establishing visual category boundaries between objects: A PET study. Brain & Cognition, 59, 299–302.CrossRef
go back to reference Serniclaes, W., Sprenger-Charolles, L., Carre, R., & Demonet, J. F. (2001). Perceptual discrimination of speech sounds in developmental dyslexia. Journal of Speech, Language, & Hearing Research, 44, 384–399.CrossRef Serniclaes, W., Sprenger-Charolles, L., Carre, R., & Demonet, J. F. (2001). Perceptual discrimination of speech sounds in developmental dyslexia. Journal of Speech, Language, & Hearing Research, 44, 384–399.CrossRef
go back to reference Tager-Flusberg, H. (1991). Semantic processing in the free recall of autistic children: Further evidence for a cognitive deficit. British Journal of Developmental Psychology, 9, 417–430. Tager-Flusberg, H. (1991). Semantic processing in the free recall of autistic children: Further evidence for a cognitive deficit. British Journal of Developmental Psychology, 9, 417–430.
go back to reference Teunisse, J. P., & de Gelder, B. (2001). Impaired categorical perception of facial expressions in high-functioning adolescents with autism. Child Neuropsychology, 7, 1–14.PubMed Teunisse, J. P., & de Gelder, B. (2001). Impaired categorical perception of facial expressions in high-functioning adolescents with autism. Child Neuropsychology, 7, 1–14.PubMed
Metagegevens
Titel
Atypical Categorical Perception in Autism: Autonomy of Discrimination?
Auteurs
Isabelle Soulières
Laurent Mottron
Daniel Saumier
Serge Larochelle
Publicatiedatum
01-03-2007
Gepubliceerd in
Journal of Autism and Developmental Disorders / Uitgave 3/2007
Print ISSN: 0162-3257
Elektronisch ISSN: 1573-3432
DOI
https://doi.org/10.1007/s10803-006-0172-4

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