How Does Speech and Language Therapy Train Use of Speech-Generating Devices for Autism? 

According to the NHS, autistic people communicate in different ways across the lifespan, and some people may need extra support when communication affects daily life, education, work or wellbeing. The NHS also explains that people can be referred to a speech and language therapist when communication needs are creating difficulties. 

Understanding the concept 

Speech-generating devices, often called SGDs, are a type of augmentative and alternative communication. They allow someone to communicate by selecting words, symbols or letters that the device then “speaks” aloud. 

The National Autistic Society emphasises that autistic people may communicate using speech, typing, writing or AAC, and that being non-speaking does not mean a lack of understanding. This matters because SGD training is not about forcing speech. It is about giving someone a reliable way to express needs, thoughts and feelings. 

Evidence and impact 

The NICE guideline for autistic adults expects services to adapt communication, including using written or visual formats and communication aids where needed. The NICE recommendations and NICE evidence summaries support communication-focused interventions delivered with individualised adaptations over time, which fits with how SLTs support long-term SGD use. 

Evidence from AAC research suggests SGDs can improve functional communication and social participation, not just requesting. For example, the AAC review by Iacono et al. 2016 reports that AAC interventions are generally effective in increasing functional communication for autistic children and young people. A systematic review focused on speech development alongside AAC, AAC and Speech Development in Children with Autism, reports that AAC does not prevent speech development and may be associated with stable or increased speech in some children. 

A scoping review on Comparing and Contrasting Barriers in AAC also highlights a real-world issue: outcomes are better when people around the autistic person are trained and supportive, but limited access, inconsistent training and stigma can reduce benefit. 

Practical support and approaches 

The RCSLT explains that speech and language therapists support autistic people of all ages using speech, language and AAC, with goals that are evidence-informed, trauma-informed and co-produced. In practice, SLT training for SGDs often includes: 

• Assessment of understanding, expression, sensory and motor needs, and day-to-day communication demands 

• Choosing and setting up an SGD so it matches the person’s preferences and access needs 

• Building a useful vocabulary that reflects the person’s real life, not just generic words 

• Teaching navigation and meaning through modelling, including aided language input, where partners use the device while speaking 

• Practising in real contexts such as home routines, school tasks, hobbies, friendships, community activities and appointments 

Support usually involves the wider network too. The RCSLT and AAC evidence both highlight the importance of training parents, carers, education staff and other communication partners so the device is available, responded to and modelled consistently. 

Guidance from Newcastle Hospitals also reinforces the value of reducing processing load, using visual supports and adapting the environment, which often makes SGD communication easier and more successful. 

Challenges and considerations 

AAC and SGD studies often include small samples and can focus heavily on younger children, so long-term evidence, especially into adulthood, is more limited. The NICE evidence base also notes variability in study quality across communication-focused interventions. 

There can be practical barriers too, such as limited access to devices, insufficient training for staff, and stigma. The National Autistic Society highlights how misinformation and assumptions about autistic communication can affect understanding and acceptance of AAC, including device-based communication. 

How services can help 

The NHS explains that a GP or autism assessment team can refer someone to speech and language therapy where communication support is needed. The NICE approach also supports ongoing reasonable adjustments and communication aids where appropriate, rather than expecting people to “cope” without support. 

SLT support is most effective when it is collaborative, personalised and respectful. The RCSLT and the National Autistic Society align on a neurodiversity-affirming view: an SGD is a valid voice, and goals should prioritise autonomy, comfort and participation. 

Takeaway 

Speech-generating devices can support autistic people to communicate more reliably, especially when speech is limited or becomes harder under stress. Guidance from the NHS, NICE, the National Autistic Society and the RCSLT supports SGD use as a practical, valid form of communication. With the right assessment, partner training and real-life practice, SLT can help SGDs become a confident, everyday communication tool. 

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.