How is augmentative and alternative communication recommended by speech and language therapy for autism?
Autistic people communicate in many different ways, and the NHS explains that this can include speech, gestures, pictures, writing and digital devices. According to the NHS, when communication differences affect daily life, education or work, people may be referred to a speech and language therapist to explore appropriate support, including augmentative and alternative communication.
Understanding the concept
Augmentative and alternative communication, often shortened to AAC, refers to methods that support or replace spoken language. The National Autistic Society explains that AAC can include signing, symbols, picture books, typing, communication apps or speech generating devices. Importantly, being non speaking does not mean a person cannot communicate or understand, and AAC is a valid and meaningful form of communication in its own right.
The National Autistic Society also emphasises that speech should not automatically be treated as the only or preferred goal. Many autistic people communicate more comfortably using written, visual or technology based methods, particularly when speech is tiring or overwhelming.
Evidence and impact
Guidance from NICE recommends adapting communication for autistic adults by using accessible formats, visual information and reasonable adjustments, recognizing that spoken language may not always be the easiest or most effective option. NICE highlights the importance of individual preferences and specialist input where communication needs are complex, which supports the role of speech and language therapists in assessing for AAC.
Research evidence supports this approach. A systematic review published on PubMed found that AAC interventions for autistic children improved communication and often supported the development of spoken language, with no evidence that AAC use prevented speech. Another review available via PubMed Central reported growing evidence that AAC can improve requesting, social interaction and participation, using both low tech and high tech systems.
Practical support and approaches
The RCSLT explains that speech and language therapists work with autistic people across the lifespan to assess communication strengths, sensory preferences and learning styles before recommending AAC. Support may include:
- choosing between low tech options such as pictures or high-tech devices
- introducing AAC gradually and in a person centred way
- supporting families, schools and workplaces to use AAC consistently
- developing communication passports to explain how someone communicates
Guidance from Newcastle Hospitals reinforces the value of visual supports, reduced language load and environmental adjustments, all of which align with AAC principles.
Challenges and considerations
The National Autistic Society highlights that AAC is sometimes wrongly seen as a last resort or as giving up on speech. The RCSLT stresses that AAC should be offered in a neuro affirming way, supporting autonomy and participation rather than masking or making someone appear more typical.
Takeaway
AAC is a recognised, evidence informed way of supporting communication in autism. Drawing on guidance from the NHS, NICE, the National Autistic Society, the RCSLT and Newcastle Hospitals, speech and language therapy recommends AAC as a positive, flexible tool to help autistic people communicate in ways that work for them.
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.
