Musically tone-deaf individuals have difficulty discriminating intonation contours extracted from speech |
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| Institution: | 1. The Neurosciences Institute, San Diego, CA, USA;2. University of Newcastle, Newcastle-upon-Tyne, UK;1. Eliot Pearson Department of Child Study and Human Development, Tufts University, Medford, MA 02155, USA;2. Department of Psychology, Tufts University, Medford, MA 02155, USA;3. Azrieli Program in Brain, Mind & Consciousness, Canadian Institute for Advanced Research (CIFAR), Toronto, Canada;1. Brain Development Imaging Labs, Department of Psychology, San Diego State University, 6363 Alvarado Ct. #200, San Diego, CA 92120, USA;2. University of California San Diego, Institute for Neural Computation, 9500 Gilman Dr. #0559, La Jolla, CA 92093, USA;3. Bird Lovers Only Rescue Service Inc., Duncan, SC 29334, USA;4. Department of Psychology, Tufts University, 490 Boston Ave., Medford, MA 02155, USA;5. Azrieli Program in Brain, Mind, and Consciousness, Canadian Institute for Advanced Research (CIFAR), MaRS Centre, West Tower, 661 University Ave., Suite 505, Toronto, ON, MG5 1M1, Canada;6. Radcliffe Institute for Advanced Study, Harvard University, 10 Garden St., Cambridge, MA 02138, USA;1. Tufts University, United States of America;2. Azrieli Program in Brain, Mind, and Consciousness, Canadian Institute for Advanced Research (CIFAR), Canada;1. College of Biomedical Engineering and Instrument Sciences, Zhejiang University, China;2. Interdisciplinary Center for Social Sciences, Zhejiang University, China;3. Neuro and Behavior EconLab, Zhejiang University of Finance and Economics, China;4. Department of Psychology, Tufts University, Medford, MA, United States;5. Department of Psychology, New York University, New York, NY, United States;6. Max Planck Institute for Empirical Aesthetics, Frankfurt, Germany;7. Azrieli Program in Brain, Mind, & Consciousness, Canadian Institute for Advanced Research (CIFAR), Toronto, Canada |
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| Abstract: | Musically tone-deaf individuals have psychophysical deficits in detecting pitch changes, yet their discrimination of intonation contours in speech appears to be normal. One hypothesis for this dissociation is that intonation contours use coarse pitch contrasts which exceed the pitch-change detection thresholds of tone-deaf individuals (Peretz & Hyde, 2003). We test this idea by presenting intonation contours for discrimination, both in the context of the original sentences in which they occur and in a “pure” form dissociated from any phonetic context. The pure form consists of gliding-pitch analogs of the original intonation contours which exactly follow their pattern of pitch and timing. If the spared intonation perception of tone-deaf individuals is due to the coarse pitch contrasts of intonation, then such individuals should discriminate the original sentences and the gliding-pitch analogs equally well. In contrast, we find that discrimination of the gliding-pitch analogs is severely degraded. Thus it appears that the dissociation between spoken and musical pitch perception in tone-deaf individuals is due to a deficit at a higher level than simple pitch-change detection. |
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