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A technique that allows individuals to monitor their own physiological processes so they can learn to control them.

Biofeedback originated with the field of psychophysiology, which measures physiological responses as a way of studying human behavior. Types of behavior that may be studied in this way range from basic emotional responses to higher cognitive functions. Today, biofeedback is also associated with behavioral medicine, which combines behavioral and biomedical science in both clinical and research settings. In biofeedback training, the monitoring of physiological responses is performed for therapeutic instead of (or in addition to) investigative

BINOCULAR DISPARITY DEMONSTRATION

This simple experiment demonstrates binocular disparity. Hold a pencil about 12 inches (30 cm) from your face. With one eye closed, align the pencil with the edge of a doorway, window, or...