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This page gives some technical information, skin conductivity graphs. The graphs show how our new biofeedback machine is capable of identifying changes in galvanic skin resistance caused by movements of the body or changes in state of mind.

Biofeedback Device Test Data -
Skin Conductivity Graphs

The graphs on this page give technical, skin conductivity data that biofeedback professionals may find useful. They were produced during the testing and calibration developmental phase of our new biofeedback device. All the graphs show results of six measurements per second of galvanic skin resistance.

Change in skin conductivity caused by smilingData graph of skin conductivity changes as measured by our biofeedback device when its user altered facial expression.

Top graph shows the change in galvanic skin resistance.
Bottom graph shows the level of resistance, ohms.

The subject remained relaxed while holding our biofeedback device as demonstrated by a steady level of skin conductivity. At 65 and 125 seconds the subject was asked to smile briefly. The graph shows how the device monitored the changes in skin conductivity that resulted.

Galvanic skin resistance during meditation Data graph of galvanic skin resistance changes as monitored by our biofeedback machine whilst its user was meditating.

This graph shows a subject during meditation as shown by galvanic skin resistance rising. At 65 and 125 seconds they are asked to briefly open their eyes. Our biofeedback device showed a distinct effect on the level of galvanic skin resistance.

Skin conductivity changes during special breathing Data Graph of skin conductivity, GSR changes as measured by our biofeedback device whilst its user did pranic breathing exercises.

This graph shows the subject during a special breathing exercises, known as 'pranic' breathing. Galvanic skin resistance is falling, i.e. skin conductivity is rising, showing that pranic breathing is having an energising effect. The pattern of change matched the rhythm of breathing in and out.

Galvanic skin resistance as meditation expert achieved a special state of mindData graph showing the galvanic skin response, as recorded by our biofeedback machine, whilst a meditation expert achieves a special state of consciousness.

This graph shows our biofeedback device monitoring an Indian healer and meditation teacher. At 150 seconds the teacher reported going into a special state of mind which lasted for 30 seconds. Before that special state, galvanic skin resistance was increasing showing an improving state of relaxation. During his special state of mind changes in skin conductivity reduced dramatically, approaching zero.

Galvanic skin resistance or skin conductivity

Note: Skin conductivity is the amount of electrical current that can pass through the skin. Galvanic skin resistance is the level of resistance to an electric current. Therefore, these two measurements are equal but opposite.