Associative learning in premature hydranencephalic and normal twins

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Science  28 Nov 1980:
Vol. 210, Issue 4473, pp. 1035-1037
DOI: 10.1126/science.7192015


A hydranencephalic infant lacking cerebral hemispheres and a normal twin were tested for associative learning. After repeated trials in which two stimuli were temporally paired, test trials were given in which the second stimulus was omitted. Cardiac orienting responses to stimulus omission indicated that learning had taken place in both infants.