The RASS is used by observing the patient's behavior and response to stimuli. It involves a series of steps: observing the patient in a resting state, then using verbal stimuli, and finally employing physical stimuli if necessary. The patientâs response to these stimuli determines their score on the scale. For example, a patient who is alert and calm may score a 0, while one who is agitated and restless may score between +1 and +3, depending on the severity of their agitation.