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A Chimpanzee’s (Pan troglodytes) Perception of Variations in Speech: Identification of Familiar Words when Whispered and When Spoken by a Variety of Talkers
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In: Heimbauer, Lisa A; Beran, Michael J; & Owren, Michael J. (2018). A Chimpanzee’s (Pan troglodytes) Perception of Variations in Speech: Identification of Familiar Words when Whispered and When Spoken by a Variety of Talkers. International Journal of Comparative Psychology. Retrieved from: http://www.escholarship.org/uc/item/01t81345 (2018)
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A Longitudinal Assessment of Vocabulary Retention in Symbol-Competent Chimpanzees (Pan troglodytes)
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In: Language Research Center (2015)
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A Longitudinal Assessment of Vocabulary Retention in Symbol-Competent Chimpanzees (Pan troglodytes)
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Fading Perceptual Resemblance: A Path for Rhesus Macaques (Macaca mulatta) to Conceptual Matching?
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Implicit and Explicit Category Learning by Capuchin Monkeys (Cebus apella)
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Chimpanzees (Pan troglodytes) show the isolation effect during serial list recognition memory tests
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A Chimpanzee Recognizes Synthetic Speech With Significantly Reduced Acoustic Cues to Phonetic Content
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Abstract:
A long-standing debate concerns whether humans are specialized for speech perception [1–7], which some researchers argue is demonstrated by the ability to understand synthetic speech with significantly reduced acoustic cues to phonetic content [2–4,7]. We tested a chimpanzee (Pan troglodytes) that recognizes 128 spoken words [8,9], asking whether she could understand such speech. Three experiments presented 48 individual words, with the animal selecting a corresponding visuo-graphic symbol from among four alternatives. Experiment 1 tested spectrally reduced, noise-vocoded (NV) synthesis, originally developed to simulate input received by human cochlear-implant users [10]. Experiment 2 tested “impossibly unspeechlike” [3] sine-wave (SW) synthesis, which reduces speech to just three moving tones [11]. Although receiving only intermittent and non-contingent reward, the chimpanzee performed well above chance level, including when hearing synthetic versions for the first time. Recognition of SW words was least accurate, but improved in Experiment 3 when natural words in the same session were rewarded. The chimpanzee was more accurate with NV than SW versions, as were 32 human participants hearing these items. The chimpanzee's ability to spontaneously recognize acoustically reduced synthetic words suggests that experience rather than specialization is critical for speech-perception capabilities that some have suggested are uniquely human [12–14].
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Article
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URL: https://doi.org/10.1016/j.cub.2011.06.007 http://www.ncbi.nlm.nih.gov/pubmed/21723125 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3143218
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Use of Exclusion by a Chimpanzee (Pan troglodytes) During Speech Perception and Auditory-Visual Matching-to-Sample
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What Meaning Means for Same and Different: Analogical Reasoning in Humans (Homo sapiens), Chimpanzees (Pan troglodytes), and Rhesus Monkeys (Macaca mulatta)
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