One explanation of criminal behaviour is cognitive factors, such as hostile attribution bias, minimalisation, and levels of moral reasoning. Research supports hostile attribution bias as a contributor to violent offending: Schönenberg and Justye (2014) found that violent offenders misinterpreted ambiguous facial expressions as aggressive, which may lead to impulsive aggression. Similarly, Kennedy and Grubin (1992) found that sex offenders often downplayed or denied their crimes, showing use of minimalisation. Moral reasoning also links to offending, as Gudjonsson and Sigurdsson (2007) found many juvenile offenders showed pre-conventional reasoning—concerned with avoiding punishment rather than ethics. However, Krebs and Denton (2005) argue that moral thinking doesn’t always predict behaviour, as decisions may be driven by self-interest and rationalised later.