The Physiological Sensors

In both pilot experiments, the drivers wore physiological sensors under his or her clothing while driving. The sensors were placed so as not to restrict the motion of the arms, the hands or the foot responsible for control of the gas and the brake. The placement of the sensors in the first pilot is shown in Figure  5. For the second pilot an EKG was placed on chest as shown in Figure  6 and the BVP was instead placed on the middle finger.

  

Figure: A diagram showing how the physiological sensors were worn by the driver in the first pilot study. The skin conductance sensor (GSR) was placed on the arch of the left foot. The respiration sensor was placed over the diaphragm. The electromyogram (EMG) was placed on the trapezius muscle on the left shoulder. In the first pilot, the BVP was paced on the driver's torso to avoid motion artifacts as shown. In the second pilot, an EKG was worn on the chest and the BVP was carefully placed on the driver's finger.