A recent study comparing telehealth coaching and in-person coaching in Project ImPACT was published in Journal of Autism and Developmental Disorders by Ying Hao and colleagues.
Hao, Y., Franco, J. H., Sundarrajan, M., & Chen, Y. (2020). A pilot study comparing tele-therapy and in-person therapy: Perspectives from parent-mediated intervention for children with autism spectrum disorders. Journal of Autism and Developmental Disorders.