the investigator will utilize "Fitbit-Charge 4" a wearable 'smart-watch' in order to collect patients' physiological measurements, including continuous heart rate, heart-rate variability and breathing rate, as well as behavioral measurements such as movements and sleep pattern in order to predict aggression and violence outburst in children under 12 years old admitted at an inpatient psychiatric ward and characterization of those physiological measures in the prediction of aggression and violence outbursts.

smartwatch device that collects physiological measures

Heart rate

heart rate variability, the data of heart rate variability is based on respiratory rate (outcome 3) and heart rate (outcome 1)

respiratory rate

sleep patterns, the data of sleep pattern is based on movements (outcome 5) and heart rate (outcome 1)

movements frequency of the patient, collected by the smart-watch using 3 axis-accelerometer that can detect movements in 3 dimensions. for example, number of steps taken.

using 'MOAS', the Modified Overt Aggression Scale score system filled by the department staff manually on each day and outburst description. the score system is made up of four categories (verbal aggression, aggression against objects, aggression against self, and aggression against others. each category is ranked by numbers. range of total score is between 0-40. higher score usually higher than 20 indicating more aggressive behavior which means worse outcome.