Dr. Cullum is a Clinical Neuropsychologist who specializes in the assessment of cognitive disorders. He is board-certified in Clinical Neuropsychology (ABPP/ABCN) and directs the Neuropsychology Program at UT Southwestern. Dr. Cullum also serves as the Chief of the Division of Psychology and Director of the Doctoral Program in Clinical Psychology. He is actively involved in research, teaching, and clinical practice.