You can use the PICO(T) to help develop your topic. The PICO(T) question is the process employed in Evidence Based Practice.
Below are resources that can help in developing your topic:
Does art therapy interventions help develop social interactions in children with autism?
Van Lith, T., Stallings, J. W., & Harris, C. E. (2017). Discovering good practice for art therapy with children who have Autism Spectrum Disorder: The results of a small scale survey. The Arts in Psychotherapy, 54, 78-84.
Systematic Review or Review example:
Schweizer, C., Knorth, E. J., & Spreen, M. (2014). Art therapy with children with Autism Spectrum Disorders: A review of clinical case descriptions on ‘what works’. The Arts in Psychotherapy, 41(5), 577-593.