| Code | Variable Name | Description | Sampling Frequency (Hz) | Units | 
    
    | EDA | Electrodermal Activity | Data from the electrodermal activity sensor | 4 | microsiemens (uS) | 
    
    | TEMP | Skin Temperature | Data from temperature sensor  | 4 | Celsius (°C) | 
    
    | BVP | Blood Volume Pulse | Data from photoplethysmograph | 64 | - | 
    
    | HR | Heart Rate | Average heart rate extracted from the BVP signal | 1 | beats per minute (BPM) | 
    
    | IBI | Inter Beat Interval | Time between individuals heart beats extracted from the BVP signal   | - | - | 
    
    | ACC | 3-axis Accelerometer | Data from 3-axis accelerometer sensor (x;y;z) | 32 | 1/64g | 
    
    | tags | Event mark times | Each mark corresponds to a physical button press on the device | - | - |