The use of internet is common for terrorism. The instant connections over internet increase the opportunity for exposure to aggression for all participants. Internet also allows for the possibility of deeper, more narrow penetration both into content areas and into the private psychological spaces of users.Terrorists use the internet to target specific segments of the population with more subtle and detailed information. There are three differences between how terrorists use the internet and other forms of media. On the internet:Terrorist groups are more pacifistic in their rhetoric.The webpages contain a great deal of detailed information.The webpages offer visitors more possibilities to take action (e.g. donations).The internet provides new tools for young aggressors who already engage in aggressive behaviours in the physical world to victimize a larger group of peers in cyberspace. Aggression refers to a behaviour directed toward the goal of harming or injuring another living being who is motivated to avoid the harm. Instrumental aggression refers to aggression that is used to attain goals. Hostile aggression refers to aggression where harm or injury to the target is the primary goal of the behaviour. This is associated with anger in response to frustration.The network theory of emotions states that emotions, cognitions and action tendencies are connected in memory through association. The activation of one element van spread to other nodes in the associative network. It is likely that instrumental and hostile aggression are a continuum. Aggression through the internet is more subtle and encompassing than overt forms of aggression (e.g. homicide with guns). Media exposure is a risk factor and not a unique cause of aggression. Individuals with certain predispositions are likely to seek out media that are consistent with those pre-existing predispositions. This is, in turn, likely to strengthen those dispositions. The general...