It's based on the psychodynamic explanation of catharsis. Freud believed the drive for aggression was innate, and the only way to reduce aggression is to engage in an activity that releases it.
He proposed that if an individual is prevented from achieving a goal, then this will lead to frustration which will always lead to aggression.
This aggression is a catharticrelease of the build-up of frustration. This aggression cannot always be directed at the source of aggression, which may be abstract or too powerful (the risk of punishment is too high) - therefore displacement occurs
In 1969, Berkowitz revised Dollard's original hypothesis.
He predicted that frustration doesn't always lead to aggression. Rather, aggression would only occur in the presence of certain cues - for example, the presence of weapons.
Pastore distinguished between justified and unjustified frustration, arguing that it is unjustified frustration that produces anger and aggression.
He found participants expressed much lower levels of anger when a bus with 'out of order' (justified) failed to stop at a bus-stop, than when a bus without this message failed to stop (unjustified)
Marcus-Newhall'smeta-analysis of 49 studied into displacedaggression supports the frustration-aggression hypothesis, specifically the concept of aggression not be directed at the originalsource of frustration.
Studies reliably showed that participants who were provoked but unable to retaliatedirectly against the cause of aggression were significantly more likely to act aggressively towards an innocent party than people who were unprovoked.
The frustration-aggression hypothesis predicts that engaging in verbal or physical outbursts is cathartic bc the aggression created by the frustration is satisfied.
Therefore, aggressive behaviour is triggered by negativefeelings generally rathe than by frustrationspecifically.
Moreover, the outcome of frustration itself can be a range of response, only one of which is aggression - for example, despair, anxiety, or determination.
Therefore, the original frustration-aggression hypothesis is arguably inadequate, as frustration doesn't alwaystranslate to aggression - and equally aggression isn't always a response to frustration.