Abstract
Biofeedback was used to increase forearm-muscle tension. Feedback was delivered under continuous reinforcement (CRF), variable interval (VI), fixed interval (FI), variable ratio (VR), and fixed ratio (FR) schedules of reinforcement when college students increased their muscle tension (electromyograph, EMG) above a high threshold. There were three daily sessions of feedback, and Session 3 was immediately followed by a session without feedback (extinction). The CRF schedule resulted in the highest EMG, closely followed by the FR and VR schedules, and the lowest EMG scores were produced by the FI and VI schedules. Similarly, the CRF schedule resulted in the greatest amount of time-above-threshold and the VI and FI schedules produced the lowest time-above-threshold. The highest response rates were generated by the FR schedule, followed by the VR schedule. The CRF schedule produced relatively low response rates, comparable to the rates under the VI and FI schedules. Some of the data are consistent with the partial-reinforcement-extinction effect. The present data suggest that different schedules of feedback should be considered in muscle-strengthening contexts such as during the rehabilitation of muscles following brain damage or peripheral nervous-system injury.
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Cohen, S.L., Richardson, J., Klebez, J. et al. EMG Biofeedback: The Effects of CRF, FR, VR, FI, and VI Schedules of Reinforcement on the Acquisition and Extinction of Increases in Forearm Muscle Tension. Appl Psychophysiol Biofeedback 26, 179–194 (2001). https://doi.org/10.1023/A:1011325519568
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DOI: https://doi.org/10.1023/A:1011325519568