Final answer:
A psychologist assisting war veterans with severe head injuries is typically a Neuropsychologist, as they specialize in the relationship between brain function and behavior.
Step-by-step explanation:
A psychologist who works with war veterans to help them overcome the effects of severe head injuries would most likely be a Neuropsychologist. Neuropsychologists specialize in understanding the relationship between the brain and behavior, particularly how injuries to the brain affect cognitive functions and behaviors. They work directly with patients, often in clinical settings, to assess and treat cognitive disorders resulting from brain injury or neurological diseases.
Comparatively, a Clinical Psychologist focuses on diagnosing and treating psychological disorders, Counseling Psychologists assist individuals with emotional, social, and vocational challenges, while Forensic Psychologists apply psychological knowledge within the legal system, including assessments of competency to stand trial and acting as expert witnesses in court.