Neuropsychology is a specialization within the field of psychology that examines brain–behavior relationships. The ability to determine these relationships rests on clearly defined behaviors and related neuroanatomical structures, neurophysiological mechanisms, and/or neurochemical processes. The field originated from medical science conducted during the 19th century, but a majority of the progress has occurred within the past 40 years, and significant contributions to the field have been made by psychologists working in both clinical and research areas. The knowledge in this field is fast growing but derived almost exclusively from work with hearing people. There has been a paucity of research with deaf individuals, especially those who identify with Deaf culture and have acquired American Sign Language (ASL) or another sign language as their native/preferred language. Initial ...