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Biological motion facilitates filial imprintingBiological motion facilitates filial imprinting |
"/Miura, Momoko/"Miura, Momoko ,
"/Matsushima, Toshiya(1000040190459)/"Matsushima, Toshiya
116pp.171
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180 , 2016-06-01
ISSN:0003-3472
内容記述
To study the functional role of the predisposed preference for Johansson's biological motion (BM) at an
early stage of life, newly hatched domestic chicks, Gallus gallus domesticus, were exposed to a variety of
motion pictures composed of light points (in red or yellow), and then tested for their learned colour
preference. Point-light animations depicting the BM of a walking hen successfully facilitated both the
approach activity during imprinting and the learned preference in the test, although significant positive
correlations did not appear between these at the individual level. Furthermore, scrambling the light
points did not significantly reduce the effects, whereas linear motion of a hen-shaped set of points had
no effect. If pretreated with the linear motion, those chicks primed with a high BM preference score
showed a high learning score in subsequent imprinting. We conclude that the local movement feature of
the BM animation is critical in making chicks approach and learn the associated colour. We propose a
scenario wherein naïve chicks have an innate preference for BM, which arises prior to imprinting
through nonspecific visual experience in the early posthatch period. The induced BM preference then
allows chicks to form a learned colour preference for the associated colour more effectively, leading to
the development of tighter social attachment.
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http://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/61473/1/AB116%20171-180.pdf
