The mission, which was invited by the Samoa government, travelled across the country holding discussions in several villages.
RNZI reports in its recently published preliminary report, it said it was concerned about the use of corporal punishment against children, which is widely known to contribute to a vicious circle of violence.
One of the experts on the mission, Eleonora Zielinska, said it was regrettable that violence was often justified as being part of Samoan culture.