AbstractBackground : Parent-mediated interventions (PMI) are an underutilised but effective approach in improving children with autism spectrum disorder's (ASD) communication, social, self-care, play, and behavioural issues as well as promoting parents' quality of life and psychological wellbeing. The Developmental, Individual-difference, and Relationship-based (DIR)/Floortime® intervention approach is one of the PMis often utilised with children with ASD and has been recommended to be offered to families of children with ASD by the Malaysia Ministry of Health. Aim: The aim of this study was to investigate the impact/sofa parent-mediated home-based intervention program based on the DIR/Floortime® model on children with ASD's pretend play, child-parent interactions, parents' quality oflife, psychological wellbeing and parenting cometence, as well as its applicability among families of children with ASD in the Malaysian cross-cultural context. The intervention program based on the DIR/Floortim.....