Dr. Decker graduated from the Ball State University School Psychology program in 2001 with a specialty in neuropsychology and research methodology. While in graduate school, Dr. Decker was a supervisor for a school psychology clinic, research director for the neuropsychology laboratory, and provided consultation for local schools. After graduation, Dr. Decker worked at Riverside Publishing as a neuropsychological test developer. While at Riverside Publishing he worked on numerous test projects including the Woodcock-Johnson Third Edition Tests of Cognitive Abilities and Tests of Achievement, the WJ-III Diagnostic Supplement, Dean-Woodcock Neuropsychological Assessment System, and Stanford-Binet Fifth Edition. Additionally, he was a co-author of the Bender-Gestalt Second Edition. In 2003, Dr. Decker taught neuropsychology and research methodology at Roosevelt University in Chicago. Additionally, he served in a joint appointment at the University of Illinois at Chicago Neuropsychiatric Institute as a pediatric neuropsychologist where he worked with children with a variety of developmental disorders and neuropsychological problems.
Dr. Decker's research interest include neuropsychological assessment, diagnostic decision making, academic assessment, development, and evolutionary psychology. He regularly conducts workshops involving neuropsychological assessment for school districts in various locations across the U.S. In addition to his continued interest in assessment, he has also been involved with research at the Language Research Center investigating primate cognition and comparative methodologies in applications to child cognitive development.