Strain theory was introduced by Robert Merton in the early 1930s in his study of wealth. He asserted that whenever a gap or discrepancy between individuals' aspirations and reality exists, frustration will ensue, and individuals will be more likely use illegitimate means to accomplish their goals . In the 1990s, Agnew expanded this theory to apply more broadly to economic aspirations. Agnew argued that people who experience strain are more likely to experience frustration or anger and are then more vulnerable to engaging in criminal or deviant behavior. Sources of strain could stem from three sources: positively valued goals that are not achieved; loss of positively valued stimuli (e.g., loss of a job, loss of a romantic relationship); and presentation of negative stimuli (e.g., history of family violence). It is important to note that strain and deviance are not causal; deviant behavior is a coping mechanism when strain develops. Since the 1990s, strain theory has been applied to other behaviors, and it has been posited that there may be a relationship between strain and cyberbullying or traditional bullying. In one study of 1,963 middle school students, a variety of strains were measured, including receiving a poor grade, breaking up with a girl/boyfriend, and having a quarrel with a family member, and level of frustration and anger was also recorded. The authors found that strain and anger/frustration were correlated to traditional bullying and cyberbullying even after taking into account gender, race, and age. Therefore, strain theory may be helpful in explaining the causes of cyberbullying.
DISINHIBITION THEORY
Disinhibition theory maintains that the Internet can promote an abandonment of some inhibitions, leading to greater disclosure, less restraint, and greater expressiveness. These types of behaviors have been classified as the "online disinhibition effect," which can fall into one of two categories: benign disinhibition (e.g.,