Neuropsychologists have obtained either a Ph.D. or a Psy.D. in psychology and have taken additional postdoctoral training in the area of neuropsychology. Neuropsychologists can provide information about how a neurological injury may affect and/or be affected by psychological variables. They also can provide information about whether a patient’s difficulties are likely to be due to brain pathology or emotional factors. Further, neuropsychologists typically administer a relatively large number of tests, called a battery, in a face-to-face manner. Test batteries are sometimes designed by the neuropsychologist to answer specific questions and at other times standardized batteries are used. In short, neuropsychologists are psychologists with advanced or postdoctoral training in evaluating brain functions and correlating specific cognitive and emotional impairments with specific brain pathology.