Behaviour which the person experiencing it finds challenging. Most challenging behaviour arises from failures of communication or to meet needs. Some is related to the person's experiences and thus needs a planned approach involving ground rules or a protocol.

behaviours which are difficult and complex to manage even within a therapeutic environment. The behaviours may be related to organic or non-organic pre-disposing factors.

Originally defined as behaviour that challenges us to find ways of managing the problems. This has now been extended to include the definition given in the text on p.7.

CB Foundation Behaviour of such intensity, frequency or duration that the physical safety of the person or others is likely to be placed in serious jeopardy, or behaviour which is likely to seriously limit or deny access to or use of ordinary community facilities, or impair a child's personal growth, development and family life.

Challenging behaviour is defined as "culturally abnormal behaviour(s) of such intensity, frequency or duration that the physical safety of the person or others is placed in serious jeopardy, or behaviour which is likely to seriously limit or deny access to the use of ordinary community facilities" Emerson, E. 1995. Challenging behaviour: analysis and intervention with people with learning difficulties. Cambridge: Cambridge University Press.