An interventional study of VG Social ABCs in Autism Spectrum Disorder, Social Communication Disorder and Autism or Autistic Traits, sponsored by Holland Bloorview Kids Rehabilitation Hospital. Active, not recruiting at 1 site in Canada. Open to participants aged 12 Months to 42 Months. Per ClinicalTrials.gov, last updated 2025-09-26.
Sponsored by Holland Bloorview Kids Rehabilitation Hospital · Not applicable, Interventional, and Treatment
The goal of this randomized control trial is to test the efficacy of the Social ABCs 6 week, group-based model using a virtual delivery platform. The Social ABCs is a caregiver-mediated early intervention program, aiming to increase child skills in directed, intentional vocalizations, and shared smiling with a primary caregiver for toddlers identified as early signs or a confirmed diagnosis of autism spectrum disorder (ASD), or having related social communication challenges. A positive RCT was previously completed using the program's in-person individual, 12-week model, and a pilot study showing preliminary promise of the virtual group-based model has also been published. This adaptation to a virtual, group-based model maintains the core components of the intervention, but allows caregivers to meet and discuss the content as a group from their home environments and complete the program in a shorter timeframe.
The main questions it aims to answer are:
Researchers will compare the Treatment group and the Control group to measure change in the target behaviours for the child, the caregiver's use of strategies, as well as caregiver stress and self-efficacy, across time-points.
Significant barriers exist to accessing early ASD-specific interventions, including long wait times due to limited system resources (e.g., insufficient funding to meet caseload, lack of sufficient skilled workforce), exacerbated by restrictions to in-person care associated with families' distance from service centres, and now COVID-19 isolation measures.
In response to system pressures and COVID-19 restrictions, the investigators adapted an evidence-based in-person program (the Social ABCs) to increase efficiency and access. Adaptations included (1) abbreviating the duration of the program to 6 (from 12), (2) developing a group-based delivery approach for didactic content, and (3) providing 1:1 coaching over a virtual platform (Zoom for Healthcare). The program builds on an evidence-based in-person model that uses direct in-the-moment coaching to help parents learn skills to support their toddlers' development. The Social ABCs is considered a naturalistic, developmental, behavioural intervention (NDBI), with a focus on child motivation, play-based learning, and shared enjoyment between caregiver and child.
This three-year, multi-site project uses a randomized control trial (RCT) design to evaluate an innovative early intervention program for toddlers with confirmed or suspected autism spectrum disorders (ASD) or related social communication challenges. This study will evaluate whether this innovative virtual group-based approach (VG-Social ABCs) yields child and parent gains compared to an active control condition. The research team will enroll 120 families, recruited from Ontario, Nova Scotia, and Alberta. Toddlers (aged 12 - 42 months), with identified social communication concerns (or a confirmed diagnosis of ASD), and their primary caregiver will be randomized into one of two conditions: (1) VG-Social ABCs or (2) the active control condition. Families randomized into the control condition will have the option to receive the VG-Social ABCs training once their participation in the control phase concludes. Outcome measures include toddler social communication indices and parent implementation fidelity (both derived from video-coding), parent-reported self-efficacy and wellbeing, and child-level social communication outcomes based on parent-report questionnaires.
Analyses will be conducted at the end of the trial. Hypotheses include increased gains (from Time 0 to Time 1) in parent - and child-related variables for families in the Treatment condition, compared to Controls. Investigators also anticipate that child- and parent-related gains will be maintained at Time 2 (i.e., no significant change from Time 1) for the Treatment arm.
The research team developed the virtual model in rapid response to the COVID-19 pandemic, and pilot data shows that this promises to be a powerful way to support families of toddlers with ASD at a developmental stage when they are most amenable to intervention. Beyond COVID-related isolation measures, there continues to be a significant need for increased access to evidence-based early intervention for toddlers with confirmed or probable autism, as many families are currently waiting on years-long waitlists for service. The research team hopes to demonstrate the efficacy of this feasible and resource-efficient intervention to encourage government decision-makers to fund this program for families, leading to increased access to intervention early in life, and improved outcomes for toddlers with ASD and their families. This model will also increase access for families who live in remote and rural regions who often have difficulty accessing important interventions, both within Canada and beyond.
1,727 studies on the registry are indexed under Autism Spectrum Disorder; 504 are open to participants now.
This study's planned enrollment of 120 is above the median of 52 across 1,371 interventional studies indexed under Autism Spectrum Disorder.
Browse Autism Spectrum Disorder studies →Holland Bloorview Kids Rehabilitation Hospital is the lead sponsor of 62 studies on the registry; 12 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
\- Participants complete the Group Social ABCs intervention program
Behavioral: VG Social ABCs
* Participants complete the active control condition: * 3 bi-weekly (virtual) group-based sessions (i.e., groups of 4-8 parents, over 6 weeks) * psychoeducational curriculum not related to social-communication delivered by study personnel not directly involved in the intervention arm * Families may access any available services in their communities (i.e., treatment as usual), which are recorded * Families will be offered the option to do Group Social ABCs intervention program after completing the Control phase
The Social ABCs is an evidence-based caregiver-mediated early intervention. This trial examines the 6-week Virtual Group Social ABCs; an adapted model of the existing evidence-based Social ABCs. The targets are functional directed vocalizations and positive emotion sharing with a caregiver. It is provided to small groups of parents (4-8 per group) who meet virtually for a series of 6 didactic learning sessions led by two trained Coaches, supported by the programs Parent Manual, PowerPoint slides, facilitated discussion, reflection, and idea generation. Each family is assigned a Coach, and one parent per family receives 9 individualized, 1:1 live coaching sessions over a 6-week period via the virtual platform with the goal of learning to implement the Social ABCs strategies with their child. 10-min video recordings of caregiver and child are taken at baseline(time 0), post intervention (time 1),and follow up (time 2) as a measurement of fidelity of implementation and child responsivity.
Also known as: Social ABCs, Group-based Social ABCs
Change from Baseline Vocal Responsiveness at 6 and 12 Weeks
Changes in toddlers' vocal responsiveness to their primary caregivers verbal prompts. Ten minute video recordings coded by blinded research coder in one minute intervals. Data from Baseline (Time 0) compared to data at Week 6 (Time 1) and Week 12 (Time 2).
Time frame: 12 weeks
Change from Baseline Parent Implementation Fidelity at 6 and 12 Weeks
Primary caregivers correct use of Social ABCs intervention strategies. Ten minute video recordings coded by blinded research coder in one minute intervals using the 'Social ABCs Parent Fidelity of Implementation Scoring Sheet' (V3, 2021). Successful implementation defined as 75% or higher. Data from Baseline (Time 0) compared to data at Week 6 (Time 1) and Week 12 (Time 2).
Time frame: 12 Weeks (Time 0 - Time 1- Time 2)
Change from Baseline Caregiver Self-Efficacy at 6 and 12 Weeks
Change in caregiver self-reported feelings of empowerment and self-efficacy. Measured using the Parenting Efficacy Measure and the Caregiver Quality of Life Questionnaire, where higher scores indicate higher levels of self-efficacy and feelings of empowerment as a caregiver. Data from Baseline (Time 0) compared to data at Week 6 (Time 1) and Week 12 (Time 2).
Time frame: 12 Weeks
Change from Baseline Parent Stress at 6 and 12 Weeks
Change in caregivers self-reported feelings of stress as measured using the Parenting Stress Index, 4th Edition (2012), where higher scores indicate greater stress. Data from Baseline (Time 0) compared to data at Week 6 (Time 1) and Week 12 (Time 2).
Time frame: 12 Weeks
Change from Baseline Vocal Initiations at 6 and 12 Weeks
Toddlers' unprompted use of intentional, directed vocalization to primary caregiver. Ten minute video recordings coded by blinded research coder in one minute intervals. Data from Baseline (Time 0) compared to data at Week 6 (Time 1) and Week 12 (Time 2).
Time frame: 12 Weeks
Change from Baseline Social Orienting at 6 and 12 Weeks
Toddler socially references primary caregiver unprompted. Ten minute video recordings coded by blinded research coder in one minute intervals. Data from Baseline (Time 0) compared to data at Week 6 (Time 1) and Week 12 (Time 2).
Time frame: 12 Weeks
Change in Baseline Words Understood and Used at 6 and 12 Weeks
Change in amount of words understood or used as reported by primary caregiver on the MacArthur-Bates Communicative Development Inventories (CDI), 2nd Edition (2006). Data from Baseline (Time 0) compared to data at Week 6 (Time 1) and Week 12 (Time 2).
Time frame: 12 Weeks
Change from Baseline Autism Symptoms at 6 and 12 Weeks
Change in autism or social-communication related skills and challenges as reported by primary caregiver using the PROCESS - Parent Rated Observation of Communication, Emotion, and Social Skills (2006). Data from Baseline (Time 0) compared to data at Week 6 (Time 1) and Week 12 (Time 2).
Time frame: 12 Weeks
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Holland Bloorview Kids Rehabilitation Hospital