. Brain mechanisms and learning, a symposium. Psychophysiology; Learning, Psychology of. FiG. 7 Re-articulatcd model with 'end in middle'. wards the rather large abnormalities characteristic of these re-articulated songs. When we come to similar experiments with hand-reared birds, very different results are obtained. It was found that a hand-reared visual isolate can be taught features of a normal song from the tape by being exposed to it during November only of its tu'st winter for a period of lo days. Figs. 5. Fig. 8 Song of hand-reared auditory isolate B/BkP after having been exposed to thi
. Brain mechanisms and learning, a symposium. Psychophysiology; Learning, Psychology of. FiG. 7 Re-articulatcd model with 'end in middle'. wards the rather large abnormalities characteristic of these re-articulated songs. When we come to similar experiments with hand-reared birds, very different results are obtained. It was found that a hand-reared visual isolate can be taught features of a normal song from the tape by being exposed to it during November only of its tu'st winter for a period of lo days. Figs. 5. Fig. 8 Song of hand-reared auditory isolate B/BkP after having been exposed to this model for 12 days January-February and 12 days February-March. March 25th, 1958. and 6 give the two songs developed in 1956 by such a bird treated in 1955. The first song shows clearly the influence of the 'tutor' in that it has three phrases otherwise unknown in the hand-reared isolate, having a clear stepwise descent but no end-phrase. The second song is of the isolate type plus two end-notes. These experiments thus produce evidence that tutor-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Council for International Organizations of Medical Sciences; Fessard, A. (Alfred); Delafresnaye, J. F. (Jean Francisque), 1919-. Springfield, Ill. , Thomas
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