Clinical neuropsychology is a sub-field of psychology concerned with the applied science of brain-behaviour relationships. A clinical neuropsychologist must be able to determine whether a symptom(s) may be caused by an injury to the head through interviewing a patient in order to determine what actions should be taken to best help the patient.

Neuropsychologist often focus on how injuries or illnesses of the brain affect cognitive functions and behaviours.  They have a doctorate in psychology and training in neuropsychology.

A neuropsychologist is interested in the brain's cognitive functions, such as attention, language, and memory. This is different from a clinical psychologist , who mainly focuses on behaviours and emotions and therapy for related concerns.

Hope this information helps you.

Good luck.