A neuropsychologist is a psychologist whose area of expertise deals with the relationship between the brain and behaviour. A neuropsychologist understands how brain structures and systems that are related to behavior and thinking work. A neuropsychologist focuses on how injuries or illnesses of the brain affect cognitive functions and behaviors. In order to practice as a neuropsychologist, the practitioner must have earned a PhD in psychology from an accredited university program which typically involves completing 10 years of specialized training and education. The practitioner also must complete a minimum two years of training under the supervision of a neuropsychologist. In addition, they have to pass mandatory examinations to become licensed for independent practice in their province.