Psychologists are specially trained in assessing for mental health disorders. Some of the common specialized psychological assessments are referred to as psychodiagnostic assessments, psychoeducational assessments, cognitive assessments, forensic assessments, and neuropsychological assessments.

Psychologists have expert knowledge of the underlying mechanisms and the possible causes of mental disorders, which arise from a combination of biological, environmental/social, and psychological factors.

Accurate identification of mental health disorders through a comprehensive assessment provides information for psychologists to inform clients about the available treatment choices that are based on the current research knowledge.