Biochemical Transfer of Relational Responding (Transposition)

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Science  26 May 1972:
Vol. 176, Issue 4037, pp. 942-944
DOI: 10.1126/science.176.4037.942


Hooded rats were trained to choose the larger of two circles in order to obtain a liquid reward. Recipients of brain extract from these trained donors showed a significant preference for an even larger circle when given a nonreinforced test for several days after the injection of extract. The substrate for relational learning may be biochemically transferred.