This is the protocol for a Campbell review. The primary objective for this review is summarising the effectiveness of VBI in promoting prosocial behaviours in a population of young people with ASD. The research questions employed to fulfil this objective include: (1) Do VBI improve prosocial behaviours in children with ASD? (2) Which social skills and interactive behaviours are most successful? (3) Do VBI generally have successful rates of skill generalisation and response maintenance? (4) Do demographic characteristics (age, gender) of participants influence the effectiveness of VBI's?