RecruitingBehavioural interventionParent-Mediated Intervention Targeting Insistence on Sameness for Autistic ChildrenThis study will examine the potential effectiveness of a virtually delivered parent-mediated intervention for insistence on sameness behaviors in autism and investigate 1) whether caregivers can learn to deliver the adapted Supportive Parenting for Anxious Childhood emotions (SPACE) intervention for IS via telehealth and 2) whether children will show greater improvement in IS behaviors.