Overview chapter -- Imaging studies linking dopaminergic systems to impulsivity in humans -- The Genetics of Externalizing Problems -- The neuropharmacology of impulsive behaviour: ten years later -- Inhibitory control and impulsivity in childhood onset disruptive behavior disorders -- Steep discounting of future rewards as an impulsivity phenotype: a concise review -- Developmental considerations in impulsivity: Implications for research and treatment -- Reinforcer Pathology: Implications for Substance Abuse Intervention -- Impulsivity and Suicidal Behavior -- Sex differences in neural circuits underlying inhibitory control -- The role of impulsivity facets on the incidence and development of alcohol use disorders -- The neurobiology of reinforcement learning mechanisms in impulsivity.