Sibling-Mediated Interventions in Autism Spectrum Disorder

Sibling-mediated interventions harness the unique familial bond between a child with autism spectrum disorder (ASD) and their typically developing brother or sister to foster social, communicative and adaptive skills. These approaches train siblings to act as naturalistic facilitators, embedding evidence-based techniques within everyday play and routines. Such interventions span structured curricula—where siblings are guided through step-by-step teaching protocols—and more flexible models that encourage spontaneous social interactions. Central to their appeal is the ability to promote engagement in natural contexts, enhance the generalisation of learned skills beyond clinical settings and strengthen sibling relationships. Outcomes reported include improved joint attention, increased functional communication and reductions in problem behaviours. Further, sibling-mediated approaches can offer cost-effective, scalable support in home environments, with potential to reach under-resourced communities and complement professional services. Emerging research also explores the moderating influence of sibling configuration—birth order, age gap and family dynamics—on intervention efficacy, underscoring the importance of personalised training and ongoing supervision by clinicians.

Research from Nature Portfolio

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Sibling-Mediated Interventions in Autism Spectrum Disorder publication trend

The graph below shows the total number of articles in sibling-mediated interventions in autism spectrum disorder across all publications each year (not limited to Nature Index journals).

Technical terms

Sibling-mediated intervention: An approach in which a typically developing sibling is trained to deliver therapeutic techniques to a sibling with ASD within natural environments.

Early Start Denver Model (ESDM): A play-based, developmental intervention for young children with ASD that integrates applied behavioural analysis with relationship-focused strategies.

Theory of Mind (ToM): The capacity to attribute mental states—beliefs, intents, desires—to oneself and others, crucial for understanding and predicting social behaviour.

Maladaptive behaviours: Patterns of activity or emotion that inhibit daily functioning, such as aggression, hyperactivity or social withdrawal.

Generalisation: The transfer of learned skills from the training context to novel settings, people or activities.

References

1. A Meta-Analysis of Sibling-Mediated Intervention for Brothers and Sisters Who Have Autism Spectrum Disorder. Review Journal of Autism and Developmental Disorders (2020).
2. Sibling-Mediated Early Start Denver Model Support for Young Autistic Children. Journal of Child and Family Studies (2024).
3. Sibling Influences on Trajectories of Maladaptive Behaviors in Autism. Journal of Clinical Medicine (2022).
4. Sibling Configuration as a Moderator of the Effectiveness of a Theory of Mind Training in Children with Autism: a Randomized Controlled Trial. Journal of Autism and Developmental Disorders (2020).