Acoustic mechanisms of note-type perception in black-capped chickadee (Poecile atricapillus) calls |
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Authors: | Charrier Isabelle Lee Tiffany T-Y Bloomfield Laurie L Sturdy Christopher B |
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Affiliation: | Department of Psychology, University of Alberta, Edmonton, AB, Canada. isabelle.charrier@ibaic.u-psud.fr |
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Abstract: | Acoustic communication in black-capped chickadees (Poecile atricapillus) has been studied intensively, the "chick-a-dee" call being among the most well described. This call consists of 4 note types; chickadees perceive these notes as open-ended categories and do so in a continuous manner, with As more similar to Bs and Bs more similar to Cs. Acoustic features contributing to the note-type differentiation are unknown. Recent analyses suggested that certain acoustic features may play a role in note-type classification. Here, the authors tested black-capped chickadees in an operant-conditioning paradigm to determine which features were controlling note-type perception. The results suggest that the note pitch and the frequency modulation in the initial portion of the note control the perception of note types. |
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