Understanding criminal attitudes and criminal thinking patterns aids in understanding criminal and antisocial behavior. Theory, research, and clinical practice in criminology demonstrate that people in conflict with the law have different attitudes and thinking styles than people not in conflict with the law, and these attitudes and thoughts are connected to deviant conduct. Reliable and valid instruments that measure criminal attitudes and criminal thinking patterns allow various approaches to ameliorating treatments. This entry provides information about the concept of criminal attitudes and criminal thinking patterns as well as information related to the assessment and therapeutic options for them.