Wearable devices are described herein including a housing and a mount configured to mount the housing to an external surface of a wearer. The wearable devices further include first and second electrical contacts protruding from the housing and configured such that the electrical contacts can be used to measure a Galvanic skin resistance of skin proximate to the electrical contacts when the wearable device is mounted to the external surface of the wearer. The electrical contacts are additionally configured to measure a capacitance between electrical contacts. The measured capacitance between the electrical contacts could be related to a capacitance of skin proximate to the electrical contacts when the wearable device is mounted to the external surface of the wearer. The wearable devices further include an electronically switched capacitor connected between the electrical contacts that can be operated to enable the Galvanic skin resistance and capacitance measurements described above.
