Forensic psychology is the interface between psychology and the law, so all psychological services provided for the legal community are forensic psychological services. However, forensic psychologists provide services which are both clinical and forensic in nature. When a psychologist treats an individual who was emotionally traumatized by an accident, the treatment is clinical in nature, designed to assist the individual in recovering from the trauma. But when asked to provide a report for the court, regarding the extent of the trauma, and to assess the psychological damage incurred, then the psychologist is providing forensic services. Psychological evaluation and consulting services intended to assist the courts in determining decisions regarding family, civil, or criminal matters, require a detailed, situation-specific assessment strategy which goes beyond the typical psychological evaluation completed for clinical purposes:

• The summary and conclusions must relate directly to the legal issues of the case.
• The relationship between psychological factors and the legal issues should be described.
• The findings should reflect standard psychological practice.
• Criticism of other experts and/or treatment providers is acceptable, but the expert should explain identified problems with their methods and/or conclusions.
• Research that supports the expert's conclusions should be noted.
• The recommendations must be practical.
• Treatment recommendations should reflect services available in the community.
• Implementation of the recommendations must be possible within the of the legal system.
• Recommendations should be clearly stated without professional jargon.

After completing a forensic evaluation, psychologists should be able to logically defend their conclusions, using explanations which are understandable to non-psychologists. Psychological experts must be able to explain complex psychological issues to non-psychologists, whether it be to a judge or to a jury, as the finder of fact. The issues should be presented in clear and simple language. The conclusions and recommendations of the expert should assist the fact finder in reaching a decision, and should not add confusion to that process. For these reasons, psychologists who complete forensic evaluations should have a broad clinical background, excellent assessment skills, superior communication skills, and experience in completing psychological evaluations in a legal setting. Psychologists should evaluate the facts of the case, and render an opinion regarding the psychological issues present. Psychologists should not offer opinions outside their area of professional competence. Psychologists are expected to function as experts within the limitations of their profession, and must recognize and identify those limitations as part of their work as experts.