“…However, there are conceptual diculties concerning the nature of aggressive behaviour in the cognitively impaired population. In particular, the notion of`intent to harm', which is a crucial element in functional de®nitions of aggressive behaviour, is dicult to assess, and probably inappropriate, in this population (Slater, 1980;Patel and Hope, 1993). Patel and Hope (1992a), in the development of the Rating Scale for Aggressive Behaviour in the Elderly (RAGE), de®ned aggressive behaviour as`an overt act, involving the delivery of noxious stimuli to (but not necessarily aimed at) another organism, object or self, which is clearly not accidental'.…”