Abstract
An attempt was made to condition 6 chronic schizophrenics with high or low baseline (at rest) EMG levels to alter their muscle tensions (EMG levels) using both EMG-biofeedback and reinforcement procedures. Pennies were awarded when the schizophrenics maintained one of two frontalis EMG levels over a period of 10 sec. Feedback concerning the presence of each of the levels was provided via two different colored lights. Results showed that schizophrenics were able to alter their EMG levels as required for penny reinforcements. When increased feedback was provided in the form of auditory clicks which transmitted more information about moment-to-moment changes in EMG levels, the ability to alter EMG levels was enhanced.
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