Monitoring Behaviors of Patients With Late-Stage Dementia Using Passive Environmental Sensing Approaches: A Case Series

•This study is to show the feasibility of using different passive environmental sensing approaches to provide objective behavioral markers of patients with dementia (PwD).•Different behavioral and psychological symptoms experienced by four PwD, such as agitation and apathy, are detected by features from the data collected using passive environmental sensing approaches such as passive infrared motion sensors and the Emerald device. Some examples of these features include number of transitions between spaces and couch usage.•These technologies may facilitate early detection and intervention of behavioral symptoms experienced by PwD, and the ability to monitor PWD's behaviors using sensors may also eventually improve the effort in care required for in person support.