Final answer:
Forensic psychologists have primary functions that include conducting assessments, consultations, and evaluations for legal purposes. They act as expert witnesses, provide research-based opinions in court cases, and are involved in jury selection and witness preparation. They may also provide psychological treatment within the criminal justice system. The correct answer is option B), C) and D).
Step-by-step explanation:
Forensic psychology is a branch of psychology that deals with questions of psychology as they arise in the context of the justice system. The primary functions of forensic psychologists include conducting psychological assessments, consultations, and evaluations for legal purposes. They assess a person's competency to stand trial, evaluate the state of mind of a defendant, act as consultants on child custody cases, consult on sentencing, and treatment recommendations, and advise on issues such as eyewitness testimony and children's testimony.
Forensic psychologists also act as expert witnesses, providing their research- or experience-based opinions in court cases. They are involved in the jury selection process and witness preparation. Additionally, they may be involved in providing psychological treatment within the criminal justice system.