The moderating effect of trivial triggering provocation on displaced aggression.

Two studies examined the interaction between the presence or absence of (a) an initial provocation and (b) a subsequent minor triggering action on the part of the target of displaced aggression. Consistent with the triggering event being seen by participants as indeed trivial when administered by itself without prior provocation, exposure to it literally had no impact on aggression toward its source. When previously provoked, however, this subsequent triggering event strongly increased displaced aggression, causing it to reliably exceed both that displayed when there was no antecedent provocation and that elicited by provocation alone. Mediation analyses showed that for participants who had been provoked, subjective feelings of displeasure concerning the triggering event mediated the effect of the trigger on aggression.