McKee, Neill, et.al. (eds) (2000) Involving People Evolving Behaviour, Southbound Press, Penang. Reviewed by Khor Yoke Lim Exploring the gap between knowledge and behavior has always been a central theoretical problem for communication planners and implementers involved in behavioral change. More often than not people are knowledgeable but their behavior shows otherwise. An archetypical example is smoking -- smokers know the negative effects of smoking but their knowledge contradict their behavior.