How are outcome adaptive therapy models that switch between ABA and alternatives being evaluated for autism? 

According to the NHS and NICE, autism support should be person centred, outcome focused and adapted over time to meet each child’s needs. Outcome adaptive therapy models apply this principle directly by using the child’s early progress to decide whether to continue, augment or switch between approaches such as discrete trial ABA and developmental social communication interventions. 

Understanding the concept 

Outcome adaptive models include designs where children start with an initial intervention and then move to a different programme if progress is limited. The strongest evidence comes from sequential multiple assignment randomised trials, or SMART designs. A landmark SMART trial by Kasari and colleagues tested how to sequence discrete trial teaching and JASP EMT, a blended naturalistic developmental model combining JASPER and EMT. 

These approaches align with the emphasis on communication and functional skills in both NICE and the National Autistic Society (NAS). 

Evidence and impact 

The SMART trial published by Kasari et al. involved 194 minimally verbal children aged 5 to 8. Children began with either discrete trial teaching or JASP EMT for six weeks. Those who made early progress received added parent training, while slower responders switched or added the alternative intervention. The most effective sequence started with DTT and then added parent training for early responders or JASP EMT for slower responders. 

Earlier sequencing work by Kasari et al. also tested JASP EMT with and without a speech generating device. This showed better spoken communication when children started with JASP EMT plus a device and intensified support for slower responders. 

Trials outside SMART designs show why developmental behavioural models may be valuable as augmentations. Evidence for JASPER EMT and other NDBIs, summarised in Schreibman et al., demonstrates improvements in spontaneous communication and joint engagement. The preschool trial by Goods et al. showed that adding JASPER to existing ABA programmes produced better joint engagement than ABA alone. 

Practical support and approaches 

Outcome adaptive models work best when goals are clearly defined at the start. Early communication measures, such as socially communicative utterances or joint engagement, can help identify whether an intervention should continue or change. Parent training, used in several adaptive sequences, is often central to improvements. 

This fits with NICE, which recommends social communication interventions delivered in play based routines with parent or teacher involvement. Adaptive sequencing also supports the NHS focus on helping communication, participation and wellbeing. 

Challenges and considerations 

Although early results are promising, only a few rigorous adaptive trials exist and follow up is short. There is limited reporting of burden, distress or negative experiences. Tailoring variables such as joint engagement, family preference or wellbeing are rarely used, even though they may be more meaningful than narrow language counts. 

The NAS also stresses that intervention changes should respect autistic communication styles and avoid coercive methods. Adaptive models therefore need careful shared decision making, transparency and sensitivity to the child’s comfort. 

How services can help 

UK services guided by NICE and the NHS can use outcome based planning to tailor support, combining behavioural and developmental strategies where appropriate. Clinicians and families can work together to review progress regularly and decide when switching or augmenting an intervention is warranted. 

Takeaway 

Outcome adaptive models reflect a shift toward personalised autism support. Early evidence suggests that switching between ABA based and developmental approaches based on response can improve communication for some minimally verbal children. In the UK context, these approaches should always follow person centred, non coercive, and wellbeing focused principles that place the child’s communication and comfort at the core. 

If you or someone you support would benefit from early identification or structured autism guidance, visit Autism Detect, a UK-based platform offering professional assessment tools and evidence-informed support for autistic individuals and families.