Science, Vol 237, Issue 4819, 1195-1197
Copyright © 1987 by American Association for the Advancement of Science
Japanese quail can learn phonetic categories
KR Kluender,
RL Diehl,
and
PR Killeen
Japanese quail (Coturnix coturnix) learned a category for syllable-initial [d] followed by a dozen different vowels. After learning to categorize syllables consisting of [d], [b], or [g] followed by four different vowels, quail correctly categorized syllables in which the same consonants preceded eight novel vowels. Acoustic analysis of the categorized syllables revealed no single feature or pattern of features that could support generalization, suggesting that the quail adopted a more complex mapping of stimuli into categories. These results challenge theories of speech sound classification that posit uniquely human capacities.