In making these ratings the psychiatrist is expected to use his clinical judgement to make overall assessments about the patients in each particular area. For example, in making the rating for depression the rater should be expressing his own clinical assessment of the severity of depression, based on both the patient's demeanour and behaviour during the interview, and the history that the patient has given concerning depression. It should be emphasised that a morbid rating (2, 3, or 4) for depression does not imply that the principal diagnosis made will necessarily be an affective illness.