Research from the Ministry of Social Development says attitudes to family violence have hardened as a result of the 'It's Not OK' campaign.
In 2008, research indicated 57% of people believed they could influence the behaviour of someone in a family violence situation.
The latest findings, released on Monday, show that has increased to 81%.
The number of people who said they had taken action against family violence as a result of the campaign increased from one in five to one in three.
The action included talking to a relative or friend about violence in their family or seeking help from an agency.
Campaign co-ordinator Gail Surgeoner the research reveals the campaign is reaching those who aren't normally comfortable taking action over family violence or a complex family problem.
