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Abstract

The new biofeedback technique permits simultaneous, preferably redundant visual and auditory presentation of any intrinsically motivating stimuli together with continous information pertaining to the physiological parameter to be controlled. Essentially, it varies the signal to noise ratio (S/N) of an audio or video signal as a function of any physiological parameter or combination of several parameters. That is, intrinsically motivating stimuli, visual and auditory, are presented through a color TV set; image and sound are initially masked by white noise, set to a level just above perception (minimum signal and maximum noise). As the experimental subject changes a certain physiological parameter, image and sound become clearer if the change occurs in the desired direction. The video signal remains synchronized at any noise level. The final S/N ratio has been utilized as an index of motivation in an experiment to evaluate the efficiency of the new technique.

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First Claim