A sensor system and method for determining if an environment is provocative, measuring a human response to this environment, and controlling a vehicle or device is disclosed. The system and method comprise a human head-worn unit with an orientation sensing element, a head-attachable display comprising a first image not responsive to pitch and roll and a display element responsive to the orientation sensing element. The system and method also comprises at least one human response sensor such as a galvanic skin response sensor, a blood pressure sensor, or an electroencephalograph. The system and method further comprise an algorithm that computes a signal that is a measure of the condition of the human based on input from the orientation sensing element and the human response sensor or sensors. The system and method also comprise an electronic interface configured for transmitting the human physical condition signal.
