His research focuses on a wide range of family violence, including partner violence, children's exposure to interparental violence and parents' use of violence against their children. During the past decade, Professor Winstok won prestigious research grants, including a grant for a longitudinal study of the escalation of conflicts to violence among partners from the Israel Scientific Foundation, published dozens of articles in refereed journals in his field, such as Interpersonal Violence, Violence Against Women, and Aggressive Behavior and presented his work at numerous international conferences in his field.