during neighborhood scans, a nurse working in a community outreach program has identified an individual staying in a local shelter. the person has not engaged with the program. during the day, the client can be observed sweeping the pavement in a particular alley with a broom. there is no obvious purpose to the behavior. the individual is dressed in winter clothing even though it is summer. the client mutters expressions that are audible but cannot be understood. based on the observations, which disorder does the nurse consider?