title: Special series on positive behaviour support--efficacy: introduction.
authors.forename: Gary W
authors.initials: GW
authors.lastname: Lavigna
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Willis
authors.forename: Phil
authors.initials: P
authors.lastname: Foreman
mesh_terms: D001521:Behavior Therapy / Q000379:methods; D006801:Humans; D001523:Mental Disorders / Q000628:therapy*; D010043:Outcome and Process Assessment, Health Care; D012944:Social Support