Final answer:
Forensic psychology is a branch of psychology that applies psychology within the justice system. It involves assessing competency, consulting on legal cases, and providing expert testimony.
Step-by-step explanation:
Forensic psychology is a branch of psychology that deals with questions of psychology within the context of the justice system. It involves assessing a person's competency to stand trial, determining the state of mind of a defendant, consulting on child custody cases, providing sentencing and treatment recommendations, and advising on issues such as eyewitness testimony and children's testimony. Forensic psychologists may also act as expert witnesses in court cases and be involved in jury selection and witness preparation. They can also provide psychological treatment within the criminal justice system.