Embracing a broadly compatibilist approach - one according to which responsibility hinges on psychological features of agents not on metaphysical features of the universe - this volume's authors demonstrate that the behavioural and mind sciences may impact on legal responsibility practices in a range of different ways. For instance, by providing fresh insight into the nature of normal and pathological human agency, by offering updated medical and legal criteria for forensic practitioners as well as powerful new diagnostic and intervention tools and techniques with which to appraise and to alter minds, and by raising novel regulatory challenges.