Alternative Communication Options for Nonverbality
The Three Types of Nonverbality
Nonverbality is not a single presentation. It reflects differences in access to the motor pathways required to produce speech.
This framework distinguishes different ways speech access may break down, but there is not yet a clinical protocol for determining which mechanism is impaired, whether it can be treated, or whether it will require long-term accommodation.
Until that level of testing exists, access to an alternative language system is essential so that communication is not delayed while the underlying mechanism remains unclear.
Complete Lack of Access
The speech-motor system is structurally or developmentally impaired. The pathway itself is limited, preventing reliable speech output.
Comparable to severe vision or hearing loss where the system itself cannot fully transmit input or output.
Intermittent Access
The pathway is intact, but access fluctuates based on nervous system regulation. Speech may appear and disappear depending on internal state.
Comparable to fluctuating hearing or visual processing where access is inconsistent rather than absent.
Situational Access
The pathway is functional, but environmental demand or stress inhibits access. Speech may be present in safe conditions and absent in others.
Comparable to sensory overload conditions where input is available but cannot be used under certain conditions.
Just as with vision and hearing, different presentations may eventually lead to different responses. Some may benefit from treatment. Others may require accommodation.
Some children may improve speech access through targeted intervention aimed at strengthening the underlying pathway.
Others will require long-term communication supports such as AAC to ensure continuous access to language while speech remains limited or uncertain.
Because there is not yet a protocol for identifying which speech mechanism is failing and what prognosis it carries, early access to alternative language is essential to reduce the risk of language deprivation syndrome.
AAC for Nonverbal Children: How to Give Access to Language
A child does not need spoken words in order to have language. What matters is access to a communication system the child can use, understand, and build from.
What AAC Is: Access to Language Starts Here
Alternative and augmentative communication includes systems that support or replace spoken language when speech is not yet usable, not fully reliable, or not the most effective way for a child to communicate.
Ideomotor Effect Risk
Subtle, unintentional influence from another person can shape movement and selection. This makes it difficult to verify that output is independently authored by the child.
Ethical Standard for Communication
Communication must be independently generated to protect agency. If another person is required to facilitate responses, the system does not meet the standard for independent communication.
Developmental Alignment
Spelling requires foundational language and motor skills. Expecting it before those skills are built creates a mismatch and can delay true language development.
Limits in Tone and Intent
Letter-by-letter output lacks built-in mechanisms for conveying tone, prosody, and intent. Without access to these features, it becomes difficult to reliably interpret meaning beyond the words themselves.
Access to Language During This Period Changes the Outcome
The priority is not speech first. The priority is making sure the person has language in time.
No First Language
No speech and no accessible alternative means no usable language input. The brain does not receive what it needs to build language.
Waiting Has a Cost
Waiting for speech without another language pathway reduces time within the critical period. Lost time matters.
AAC Provides Language
AAC provides usable language input during development. This gives the brain a working language system to build from.
- AAC is not the same as growing up without language.
- If speech later becomes usable, AAC functions like an added language system.
- If speech does not become usable, AAC still functions as the person’s first accessible language.
The brain needs one functional language system during development. Without it, the developmental outcome changes.
Types of AAC Systems and How They Work
Pictures, Symbols, and Printed Supports
These include picture boards, printed choice boards, visual schedules, communication books, and symbol-based supports. They are simple, flexible, and often useful as a starting point.
Single-Message and Basic Voice Output Devices
These include buttons or devices that produce recorded speech when pressed. They support cause-and-effect, early communication, and consistent access without the complexity of full systems.
Speech-Generating Devices and Apps
These include tablets, dedicated AAC devices, and communication apps that allow the child to select words, symbols, or phrases that are spoken aloud by the device.
Signs, Gestures, and Manual Communication
These include sign language, key word signs, gestures, and body-based communication systems that do not require an external device.
How a Child Physically Accesses Language Matters
Access must be independent and matched to the child’s motor and sensory abilities.
Touch
Selection using hands or fingers on a device or communication board.
Eye Gaze
Selection using eye movement with tracking technology or a clearly structured gaze system.
Scanning
Items are highlighted in sequence and selected using a switch.
Auditory Scanning
Options are spoken aloud and selected when heard.
Sign Language
Manual signs used as a complete language system.
Facilitated Communication
Requires another person to guide or structure responses. Output cannot be verified as independently authored.
The Right System Is the One the Child Can Use
The best communication system is not the one that looks most advanced. It is the one the child can access, understand, and use with increasing independence.
- Motor demands
- Visual demands
- Auditory processing demands
- Symbol understanding
- Attention and regulation
- Consistency across settings
- How much support the system requires
A communication system only works if the child can reliably access it. Access must come before expectations.
How to Choose an AAC System That Actually Works
Parents usually do better starting with fit, access, and growth potential rather than starting with what looks most advanced.
Can the child use it reliably?
The system must match the child’s motor and sensory profile.
Does it match comprehension?
The language level must match what the child currently understands.
Can it be used across settings?
Home, school, therapy, and community use should all be possible.
Can it expand over time?
The system should support more language, not just immediate needs.
What AAC Should Allow a Person to Do
Request
Ask for wants, needs, help, and basic supports.
Respond
Answer questions, make choices, and show understanding.
Express
Share preferences, thoughts, feelings, and experiences.
Participate
Engage in learning, routines, relationships, and daily life.
Stages of Language Development With AAC
AAC language develops in stages. The sequence reflects how communication is built: joint attention, access, meaning, use, and expansion.
Joint Attention
Shared attention between a person, another individual, and an object. This is the foundation for communication and interaction.
Access and Cause-Effect
The person learns how to use the system and understands that selections produce consistent outcomes.
Symbol and Meaning
Symbols or words begin to carry meaning, allowing intentional communication in familiar contexts.
Functional Communication
Communication expands to requesting, responding, commenting, and participating across routines.
Expansion and Flexibility
Language becomes more flexible and generative, with increasing independence across settings and partners.
Progress varies by person. Movement between stages is not linear, and regression during stress is expected. Consistent access and modeling support development.
What If AAC Is Difficult at First?
All languages require immersion, exposure, and repeated use to develop. AAC follows the same developmental process.
A person does not immediately know how to use a language system. Language develops through seeing it used, hearing meaning paired with symbols, and having consistent opportunities to use it over time.
Difficulty early on does not mean AAC is the wrong fit. It reflects the early stages of language acquisition, not a lack of ability.
Language develops when it is consistently present and used in real interactions.
Repeated pairing of symbols with meaning builds understanding over time.
Opportunities to communicate across the day strengthen access, understanding, and independence.
Struggling to use AAC is not the same as lacking the ability to learn language. It reflects where the person is in the learning process.
Removing AAC because it is difficult reduces access to language during a critical developmental period.
Continued immersion, exposure, and meaningful use are what support language development over time.
What Most People Get Wrong About AAC
- Using AAC means giving up on speech
- A child should wait for speech before being given language supports
- A communication system only matters if it looks typical to others
- The child has a way to communicate now
- The system can grow with the child
- The child is given repeated chances to use it meaningfully
S2C and Facilitated Communication: Where the Risks Are
Facilitated communication approaches such as Spelling to Communicate and Rapid Prompting Method are often presented as pathways for nonverbal individuals to demonstrate complex language. The critical issue is not intelligence or assumed competence. The issue is whether the method itself produces communication that is independently generated, developmentally built, and verifiably authored by the child.
Language development requires a system that a child can access independently, learn through repeated exposure, and build from over time. When a method depends on another person to guide attention, present options, or structure responses in real time, it changes the nature of the output. Without clear independence, it becomes difficult to determine whether the communication reflects the child’s language or external influence.
Ideomotor Effect
Subtle, unintentional influence from another person can shape movement and selection. This makes it difficult to verify that output is independently authored by the child.
Ethical Requirement
Communication must be independently generated to protect agency. If another person is required to facilitate responses, the system does not meet the standard for independent communication.
Developmental Mismatch
Spelling requires foundational language and motor skills. Expecting it before those skills are built creates a mismatch and can delay true language development.
Limits in Tone and Intent
Letter-by-letter output lacks built-in mechanisms for conveying tone, prosody, and intent. Without access to these features, it becomes difficult to reliably interpret meaning beyond the words themselves.
Independence Determines Validity
A communication method is only valid if the child can generate language independently, consistently, and without real-time influence from another person. Without independence, authorship cannot be confirmed and language development may be delayed.
What If My Child Struggles to Learn AAC?
Learning any language takes time, exposure, and repetition. AAC is no different.
Children do not immediately “know” how to use a language system. They learn it through immersion, modeling, and consistent use over time.
Difficulty using AAC early on does not mean the child cannot learn it. It means they are in the early stages of language acquisition.
Learning the System
The child is building understanding of symbols, words, and how communication works.
Repetition Builds Access
Consistent modeling and use across environments strengthens recognition and use over time.
Language Develops Gradually
Communication moves from simple selections to more complex and independent expression.
Struggling to use AAC is not the same as lacking the ability to learn language. It reflects where the child is in the learning process.
Removing AAC because it is difficult can reduce access to language during a critical developmental period.
Continued exposure, modeling, and opportunity to use language are what support development.
If a child struggles to use AAC, they still need access to language. Learning requires time, not removal of the system.
Resources:
American Speech-Language-Hearing Association. (n.d.). ASHA warns against Rapid Prompting Method or Spelling to Communicate. Retrieved from https://www.asha.org/slp/asha-warns-against-rapid-prompting-method-or-spelling-to-communicate/
National Scientific Council on the Developing Child (2007). The Timing and Quality of Early Experiences Combine to Shape Brain Architecture: Working Paper #5. http://www.developingchild.net
Franchak JM, Yu C. Visual-motor coordination in natural reaching of young children and adults. Cogsci. 2015 Jul;2015:728-733. PMID: 29226279; PMCID: PMC5722454.
Gowen E, Earley L, Waheed A, Poliakoff E. From "one big clumsy mess" to "a fundamental part of my character." Autistic adults' experiences of motor coordination. PLoS One. 2023 Jun 2;18(6):e0286753. doi: 10.1371/journal.pone.0286753. PMID: 37267374; PMCID: PMC10237488.
Hall WC. What You Don't Know Can Hurt You: The Risk of Language Deprivation by Impairing Sign Language Development in Deaf Children. Matern Child Health J. 2017 May;21(5):961-965. doi: 10.1007/s10995-017-2287-y. PMID: 28185206; PMCID: PMC5392137.
Ehri, L. C. (2023). The science of learning to read: Bridging research and practice. American Federation of Teachers. https://www.aft.org/ae/fall2023/ehri