Abstract: The running of a program, designed to train the user to control one or more aspects of his or her psycho-physiological state, is controlled by signals representative of a psycho-physiological parameter of the user, e.g., galvanic skin resistance. This may be detected by a sensor unit with two contacts on adjacent fingers of a user. The sensor unit is separate from a receiver unit which is connected to a computer running the program.

Abstract: Apparatus and a program designed to train the user to control one or more aspects of his or her psycho-physiological state is controlled by signals representative of a psycho-physiological parameter of the user, e.g. galvanic skin resistance. This may be detected by a sensor unit with two contacts on adjacent fingers of a user. The sensor unit can be separate from a receiver unit which is connected to a computer running the program. The apparatus is described for use in treating patients with a physiological condition, for example, irritable bowel syndrome. In a treatment session, one or more psycho-physiological parameters of the patient is sensed and the sensed parameter used to alter a display which the patient watches. The display includes a visual or pictorial representation of the physiological condition being treated which changes in appearance in a fashion corresponding to the physiological change desired in the patient.

Abstract: Video display apparatus e.g. for use in biofeedback or in diagnosis is described. Between an audiovisual reproduction unit such as a video cassette player and a television display, the invention provides a signal modifying unit which can cause the television display to change. The amount of change and optionally also its type may depend on the sensing of a user parameter, for example a psychophysiological parameter of the user or patient such as electrodermal activity. The signal modification device is preferably pre-programmed and microprocessor controlled. It may also react to coded signals embedded in the composite video signal recorded on the video cassette.