Some persons with intellectual disability or comprehensive cerebral palsy cannot communicate unequivocally how they are, how they react to situations and people, whether they are in pain or experience discomfort, anger or fear. Their modes of communication (sounds, grimacing etc) may be unintelligible or ambiguous to their caregivers.

With the use of heart and/or respiration monitors the investigators aim to give these persons a means to communicate their immediate reactions or responses. The respiration monitor is meant to register sleep at night, so that the participants can communicate whether they have slept well or not the previous night.

Heart rate (HR) is considered to reflect a persons autonomic response to situations, whether external (what happens around us) or internal (pain or pleasure, joy or fear). Some persons with severe intellectual disability or comprehensive cerebral palsy or childhood autism cannot communicate unequivocally, either because they lack the cognitive prerequisites and language or because they lack control over their muscles used for speech.

The investigators believe that these persons, through their heart rate, as registered with a commercially available chest belt or wrist watch, may communicate something about their well being and their reactions, preferences, aversions and fears.

Many persons with intellectual disability, comprehensive cerebral palsy or childhood autism (the participants in this study) have sleep problems, but these may go unnoticed. Participants often have a fixed schedule for the day, and this is carried out irrespective of the shape they are in, e.g. irrespective of how well they have slept the night before. The challenges may then be too much for a sleep-deprived person, and frustration and even self harm and aggressive behavior may be the result. With the use of a respiration monitor that assesses sleep from the person's breathing pattern, the person in question may be able to communicate to her/his caregivers how the previous night's sleep was.

Information about heart rate and sleep may contribute to better care and health services for persons who are unable to communicate unequivocally because of intellectual disability, autism and/or cerebral palsy.

Inclusion Criteria:

• intellectual disability with or without autism and/or cerebral palsy that render the participant unable to communicate his/her needs and reactions unequivocally.

Exclusion Criteria:

• allergic skin reaction to chest strap

Participants are persons with intellectual disability (ID) and/or cerebral palsy (CP) that render the participant unable to communicate unequivocally. Participants with ID will typically have severe (IQ score 20-35) or profound (IQ score <20) ID. However, some may have moderate ID (IQ score 35-50) combined with autism of a degree that renders them unable to communicate unequivocally.

Participants with CP typically have a severe variant that implies impaired control over muscles involved in communication (speech, gaze direction, gesticulation, pointing, mimic/grimacing), rendering them unable to communicate unequivocally. However, some participants with CP may also have ID, which contributes to the communication difficulties.