Assessment Services A psychological assessment can provide valuable information for children, adolescents, or adults who are having difficulty at school, work, home, or in their interpersonal relationships. Psychological assessments can help to better understand areas of concern, identify strengths, and provide practical recommendations to improve quality of life. The length of a psychological assessment varies depending on the concern being addressed. An average psychological assessment is between eight (8) and 12 hours, which includes a clinical interview, psychological testing, gathering and reviewing collateral data, report writing, and a feedback session.