SEROTONIN

Serotonin

Linked to mood and impulsiveness

Mann et al (1990)

Drugs which reduced serotonin increased measures of hostility and aggression in males but not females

Scerbo and Raine 1993- conducted a meta-analysis on 29 pieces of research into anti-social adults and children

Found low levels of serotonin

Higley et al 1996

Testosterone positively correlated with aggressiveness but not impulsivity

Serotonin negatively correlated with impulsivity and extreme aggression

Krakowski 2003

While serotonin was implicated in lack of impulse control and violence, to make a causal link is difficult