It depends because some are self-assessments. Sometimes, psychologists will be observing and evaluate their patients. Based on those, the answers or ratings are subjective, but there are sometimes score ranges that give a semblance of objectivity, just so the psychologist can determine the courses of action they can possibly take to help their clients.
In the case of the Center for Epidemiologic Studies Depression Scale (CES-D), a score of 16 or higher means that your patient is depressed. The higher the score, the more severe their depression is likely to be.











