▁laws ▁and ▁policies ▁regarding ▁this ▁issue . ▁ ▁Effect iveness ▁of ▁inter vention ▁programs ▁ ▁Ev idence ▁for ▁the ▁effect iveness ▁of ▁inter vention ▁programs ▁can ▁be ▁divided ▁into ▁two ▁types . ▁One ▁type ▁is ▁impact ▁studies ▁where ▁the ▁aim ▁of ▁the ▁evaluation ▁is ▁to ▁demonstrate ▁a ▁statist ically ▁significant ▁improvement ▁in ▁out comes ▁on ▁a ▁population , ▁which ▁can ▁be ▁attributed ▁to ▁the ▁inter vention . ▁A ▁second ▁type ▁is ▁qual itative ▁studies ▁which ▁aim ▁to ▁ill uminate ▁the ▁mechan isms ▁through ▁which ▁program ▁participants ▁can ▁access ▁the ▁resources ▁and ▁help ▁offered ▁in ▁the ▁program ▁to ▁achieve ▁better ▁out comes . ▁ ▁Imp act ▁studies ▁▁ ▁Several ▁inter vent ions ▁aim ed ▁at ▁families ▁where ▁child ▁neglect ▁is ▁occurr ing , ▁have ▁been ▁subject ▁to ▁an ▁impact ▁study . ▁ ▁Video ▁interaction ▁guidance ▁ ▁Video ▁Inter action ▁Gu id ance ▁has ▁been ▁used ▁where ▁concerns ▁have ▁been ▁expressed ▁over ▁possible ▁parent al ▁neglect ▁in ▁cases ▁where ▁the ▁focus ▁child ▁is ▁aged ▁ 2 – 1 2 , ▁and ▁where ▁the ▁child ▁is ▁not ▁the ▁subject ▁of ▁a ▁child ▁protection ▁plan . ▁An ▁evaluation ▁of ▁the ▁project ▁demonstrated ▁that ▁VI G ▁produced ▁a ▁significant ▁change ▁in ▁the ▁emot ional ▁and ▁behaviour al ▁difficulties ▁of ▁the ▁population ▁of ▁children ▁who ▁received ▁the ▁service , ▁and ▁improvement ▁in ▁reported ▁level ▁of ▁parent ing ▁and ▁reported ▁parent al ▁relationship ▁with ▁their ▁children ▁in ▁the ▁population ▁of ▁parents ▁whose ▁children ▁received ▁the ▁service . ▁The ▁data ▁ex cludes ▁to ▁parents ▁who ▁failed ▁to ▁complete ▁the ▁programme ,