Conditioning of a Free Operant Response in Planaria

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Science  15 Mar 1963:
Vol. 139, Issue 3559, pp. 1048-1049
DOI: 10.1126/science.139.3559.1048


The response of breaking a photoelectric cell beam was automatically recorded and reinforced. Termination of an intense light was the reinforcement in an escape conditioning situation. The rate of response for the experimental subjects was significantly different from that of controls matched for equivalent changes in light intensity.