This literature review looks at how these terms can affect brain studies, diagnosis and criminology. Antisocial personality disorder (ASPD) is a complex term used in the DSM 5 (Diagnostic and Statistical Manual of Mental Disorders). ASPD has sub-categories; psychopathy, and sociopathy are two of the sub-categories. Each of the sub-categories have additional sub-categories within them. The terminology concerning ASPD and all of its more specific areas is incredibly complex, and may hinder research when used improperly. This literature review will show how correct terminology is important to furthering research in the criminal population, and how furthering brain research will help develop clearer models, and will also touch on the main populations of study, for research growth on this topic of ASPD.