Creole birdsong?
Yesterday, I spent a fascinating afternoon at Ofer Tchernichovski's lab at CCNY. And a couple of weeks ago, the Penn Linguistics Department colloquium featured Ofer talking about some of his lab's recent research, including this work: Olga Feher, Partha P. Mitra, and Ofer Tchernichovski, "Abnormal isolate birdsong evolves into normal song over a few generations".
Zebra finches are among the songbirds who learn their songs by imitating adults, just as human children learn their language by interaction with those who already know it. Male songbirds raised in isolation, without any conspecific adult models during the critical period for song learning, are handicapped for life: they develop only an ill-organized, infantile "subsong". From the example of abused or feral children like Genie, we know that something similar happens with human children.
In both cases, this raises a sort of chicken-and-egg question: if normal development requires an adult model, then which came first, the pupil or the tutor?
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