Benjamin Hardy, Brigham Young University
Social and Behavioral Sciences
Informed by I3 theory, three studies examine whether engagement in extradyadic behavior is related to aggressive behaviors. It is hypothesized that extradyadic behavior is related to heightened aggression toward a romantic partner. Study 1 (n=97) tested the relationship between extradyadic behavior and anger and found that acts of extradyadic behavior were related to increased use of anger words when describing a recent transgression of a relationship partner. Study 2 (n=72) tested the relationship between extradyadic behavior and aggressive behavior during an interaction. It was found in Study 2 that reports of extradyadic behavior were linked to hostility, criticism, and frustration expressed to a relationship partner. Study 3 (n=99) longitudinally examined the relationship between extradyadic behavior and aggression, and found that extradyadic behavior at Time 1 predicted aggression toward a relationship partner at Time 2, controlling for initial aggressive behavior. Study 4 (n=473) again longitudinally examined the relationship between extradyadic behavior and aggression using a larger sample and longer time frame of twelve weeks and found that extradyadic behavior at Time 1 predicted aggression toward a relationship partner at Time 2, controlling for initial aggressive behavior.