Psychological assessment focus on assessing the normal and abnormal nature of a person's overall functioning. The specific nature of these evaluations vary depending on the issues to be addressed, but they involve at least the following components: a clinical interview, a mental status examination, and one or more psychological tests. These evaluations can be brief, with the psychological testing limited to one or two short questionnaires which focus on specific concerns, or they can be long, comprehensive evaluations consisting of lengthy objective and projective measures of personality. Sometimes measures found in other evaluations may be included for more breadth, such as intellectual assessment instruments or brief neuropsychological screening measures.