 She gathered forty-one participants ranging from infancy through seven years old and trained the parents to use event sampling and track the outbursts of anger they saw in their children.It was through this experiment that she suggested that children who were less than one year old, had the most notable triggers of anger due to repetitive child care, minimal physical irritations, and limitations of physical movement.However, Goodenough’s research findings indicated that by the time the child reached the age of four, social interactions became the most significant basis of anger.