Operant Conditioning of Heart Rate

Science  17 Aug 1962:
Vol. 137, Issue 3529, pp. 530-531
DOI: 10.1126/science.137.3529.530


Delay of shock was made contingent upon acceleration of heart rate in human subjects. The number of accelerations rose across sessions for these subjects and fell for their yoked-controls who received equal amounts of noncontingent shock. A shorter delay produced more accelerations but faster adaptation. Interpretation of changes in heart rate is confounded by related respiratory changes.