Sensors for Communication for Persons Who Cannot Communicate Unequivocally

The use of sensors to monitor physiological variables (e.g. heart rate, sleep). The design is a before-and-after comparison with respect to whether the use of sensors has changed the caregivers' practice and their (perceived) understanding of the participant. The frequency of participants' self harm or aggressive behavior after as compared to before the introduction of pulse- and respiration monitors will also be charted.