Electrodermal Activity (EDA)
Electrodermal activity — also known as galvanic skin response (GSR) — measures changes in skin conductance caused by sweat gland activity. It is one of the most reliable indicators of emotional arousal and sympathetic nervous system activation.
Accepted Fields
| Field | Type | Unit | Description |
|---|---|---|---|
eda | float | uS (microSiemens) | Skin conductance level |
skin_temperature | float | °C | Peripheral skin temperature — drops during stress due to vasoconstriction |
Status
EDA signals are accepted and stored by the API. Fusion into the stress score is planned for a future release.
Compatible Devices
- Empatica E4 / EmbracePlus — medical-grade EDA wristband
- Shimmer3 GSR+ — research sensor
- Any wearable that outputs skin conductance or skin temperature
Example Payload
{
"session_id": "sess_abc123",
"timestamp": "2026-03-30T14:30:00Z",
"eda": 4.2,
"skin_temperature": 33.1
}