New York: Doubleday.
Fourth, one must determine the goal of the questionable behavior: the goal of abuse tends to be embarrassment or domination of the victim. Google Scholar Krienert, J. Journal of Interpersonal Violence, 17 2— Behind closed doors: Violence in the American family.
Second, one must determine if the behavior is an isolated incident or part of an enduring pattern: abuse is, by definition, a long-term pattern rather than occasional disagreements.
Advances in Applied Developmental Psychology, 10, — Google Scholar Gelles, R. Journal of Interpersonal Violence, 24, — The former is characterized by expressions of affection and love, while the latter is characterized by force and domination.
Similarly, Tyree and Malone  report that women's violence as adults is more strongly correlated with aggression towards siblings during childhood.
Journal of Marriage and the Family, 54, — It may or may not involve physical touching, coercion, or force. Additionally, an apparently good sibling relationship, with no physical or emotional direct aggression, may hide this type of abuse.
Negative sibling interaction patterns as predictors of later adjustment problems in adolescent and young males.