All About Spelling to Communicate


Topics we’ll cover:

Spelling to Communicate – New Research

What does this card in the video below symbolize?


Looks like a simple piece of paper right? It is so much more. This is what is used by people who communicate through something called spelling to communicate but many times it’s abbreviated as S2C.

A person points and touches so that they could spell out words, sentences, paragraphs, and even books!

Just so you are aware that this simple little piece of paper is very controversial.

What’s the Controversy with Spelling to Communicate

Let’s understand this controversy a little bit. The people who use this way to communicate the most are people with autism who are non-speaking. Sometimes they’re labeled severely autistic or profoundly autistic. Most of these people are thought to have very low intelligence because they can’t speak, they can’t answer academic questions, and their body movement is very erratic and unfortunately, many people make the assumption that there is no intelligence. Which then their life then consists of accessing education at basically the kindergarten level for two decades! (school lessons like- What day is today? Is it cloudy “A-B-C”? You get the idea, right?) So they do this for two decades, and their future, it’s quite bleak.

So you now have a picture in your mind of the type of person who would use this board to communicate. So why is this piece of paper so controversial? Because many people believe that there is no way a person who is profoundly autistic with severe behaviors could actually be intelligent. They say that the person holding this piece of paper is actually moving it to the finger and it’s not really the autistic person who is communicating, but rather the person holding it who’s manipulating it. That’s not right that someone’s intelligence can be entirely written off that easily. It’s not fair to anyone, and you know I am about quality science, so what’s the science of spelling to communicate? There has been one research study done in 2020, this is cutting-edge science for you to know this study actually leverages technology to answer the question is the autistic person actually spelling on their own.

Study on Spelling to Communicate (S2C)

  • There were nine nonspeaking autistic individuals and they had been using the letter boards for at least two and a quarter years, so these were experienced spellers,
  • They communicate without receiving physical support, meaning the person who is holding the letter board does not touch their hand, arm, or anything. No one is touching them at all while they are spelling. There is a person holding the letter board.
  • Participants wore a head-mounted eye tracker as they responded to 24 questions about an article read aloud to them by a familiar assistant.

The study structure

  • Participants composed their responses by pointing independently with the index finger of their right hand to letters on the letter board held vertically by the assistant. Again, the assistant did not touch them.
  • The same individual served as the assistant for all participants
  • Responses ranged in length from a single word (so let’s say the question was, “Name a type of flower?” the answer was “Sunflower”), or long answers (let’s say the question was, “Can you think of something you have to wait for?” The answer was, “That is hard, I feel like the world is waiting on me, not the other way around”).

So you can see the spelling and the length of communication varied depending upon the question and also what the person felt like answering.

The discussion

  • Here’s a direct quote, “The accuracy, speed, timing, and visual fixation patterns reported here suggest that participants were not simply looking at and pointing to letters that the assistant holding the letter board cued them to”.
  • “Instead, our data suggest that participants actively generated their own text fixating and pointing to letters that they selected themselves.”

A little further in the discussion,

  • This is not to deny that the assistant occasionally influenced participants.
  • On the contrary, the assistant sometimes redirected participants who seemed to lose their train of thought, requested clarification, interrupted, and said aloud a word before the participant finished spelling it.
  • Importantly, however, this kind of influence is also common among speaking people as when someone helps another one find a word or completes their sentence.

More Clarity

  • This sample population was unique because it comprised nonspeaking autistic people who were intentionally chosen because they were experienced letter board users
  • And here’s another direct quote. “We are not claiming that all nonspeaking autistic people can learn to convey their thoughts using a letter board.”
  • The scientists in the paper conclude that participants in their study were spelling their own thoughts based on their speed and visual fixation patterns.

The paper is very technical. There are lots of graphs and figures. If you want to read the research, click here to read the scientific article. The scientists conclude that the participants were spelling on their own based upon all the analysis of the data provided by the eye tracking technology.

  • The scientists do not claim that someone who spells slowly or whose eyes cannot be tracked is incapable of conveying their own thoughts.

The Conclusion

“The blanket dismissal of assisted autistic communication is therefore unwarranted.”


Sci Rep. 2020 May 12;10(1):7882

Spelling to Communicate Boards

Spelling to communicate. What is it? How does it work? These are some questions that you might be asking yourself if you’ve heard about it. And if you or your child have difficulty speaking, then this article is for you.

Spelling to communicate is sometimes abbreviated as S2C. It’s a cutting-edge technique that has one clinical study completed already.

Speech and motor planning

Let’s think about speech. There’s a lot of motor planning involved. We have to coordinate our jaw, tongue, lips, and breath. Many fine motor skills are going on, and many people with autism have motor planning difficulties. So much so, that there’s a discussion about adding motor planning difficulties to the requirements of an autism diagnosis.

For some, motor planning is challenging; for others, speech is also very difficult. So S2C was developed specifically for those with autism who have motor planning difficulties.

S2C uses gross motor skills, which are generally better, although still difficult, to access communication. You might be thinking, “Okay, but what about using the different devices and just hitting buttons and things like that?” That all involves fine motor skills. S2C involves gross motor skills.

Communication boards

Stencil board

People generally start with stencil-like letter boards, and they have to use gross motor skills to poke a pencil through the letter to spell the word.

Each letter board has only a third of the alphabet, so the target alphabets are quite large. Someone holds the letter board and the speller pokes a pencil through the letter so that there’s no doubt what letter they are choosing.


The pencil helps with targeting and gives sensory feedback. Generally, students start with a pencil when using this letter board, and then they progress to using their fingers to poke through the letter board to spell whatever word they want.

Math board

Math can also be introduced. The maths board has numbers and the maths functions addition, subtraction, multiplication, division, and equals. And it works the same way – the student pokes their finger through the number or function.

Single board

As mastery improves, a single letter board is then used. And this makes a big difference because all the letters are on one board. There’s a lot of speed increase when students use one letter board with all the letters. And many students get really excited when they get up to this level!

The students are still poking their fingers. It’s much smaller, but they’re poking their finger to get that sensory feedback. They become so proficient in letter identification that they can spell words, sentences, paragraphs, and even books!

Communication partner

There is a communication partner that is always holding these letter boards. There’s a little handle on the board for the partner to hold, and the learner pokes through the letter. 

With S2C, the communication partner, the person that is holding these letter boards, never touches the speller. They might give redirections verbally, but there’s no assistance with the arm. There’s no hand-over-hand, hand-under-hand, or anything along those lines. Again, there might be a verbal redirection or some type of verbal prompt. 

Laminated Spelling Boards

The next level of mastery then typically is to move to the laminated letter board. It’s lighter and easy to carry. On the backside of this letter board, you have math functions as well. 

Speakers just touch the letters. I have seen some people spell on this letter board so fast that I can’t keep track of what they’re spelling because they’re so quick. Those are very proficient spellers. Sometimes they’re called fluent spellers or open spellers. 

Some students then go on to spelling on a keyboard, but not everyone. It’s a personal choice. 


S2C seems like a great option for people with autism to have, yes? Well, 10 to 20 years ago, there was a lot of controversy about using a technique similar to this. And the criticism was that the communication partner, the person holding the board, was actually moving the board and that the person spelling was not really spelling. 

This research study that was done on this technique clearly answers the question, “Is the person spelling the one who is selecting the letter?”


What is a Spelling to Communicate Practitioner?

Historically, people with non-speaking autism were considered to have low intelligence. Because they didn’t have a way to communicate their intelligence, they were thought of as lacking intelligence. Which is not true. 

Using S2C, non-speaking people with autism can communicate with other people. In their initial S2C learning stages, the spellers are assisted by communication and regulation partners. Some people call that partner an S2C practitioner, but that’s not technically accurate.

So what is an S2C practitioner, and how did it come about? Let’s learn more about them.


Elizabeth Vosseller is the person who is credited with originating and growing the S2C technique. She is, by training, a speech and language pathologist. She’s had decades of experience working with non-speaking individuals and is very dedicated to the non-speaking population of autism.

What is S2C?

S2C is a method of teaching purposeful motor skills for communication to individuals with autism and other sensory-motor challenges as a means of augmentative and alternative communication (AAC). As motor skills improve through consistent practice, students progress from pointing to letters on the letter boards to typing on the keyboard.

Technically at this moment, S2C is not a therapy.

What do S2C practitioners do?

  • S2C practitioners work with non-speaking children and adults to teach them the motor skills necessary to point to letters to spell words, sentences, paragraphs, books, and so forth. 
  • S2C practitioners also coach and guide parents, teachers, siblings, au pairs, or anyone who will regularly be with the speller to provide the speller with continued support. 

If your child is learning S2C, you may want to learn to be a great communication and regulation partner (CRP) so that they can spell with you and share their innermost thoughts. The S2C practitioner is the professional who will teach you this approach. A communication and regulation partner is anyone who can spell with the speller.

Certifying organization

The International Association for Spelling as Communication (I-ASC) is the organization that trains S2C practitioners. The I-ASC leadership council is led by 10 non-speaking people with autism who are fluent on the letter board. The organization’s leadership also includes an executive team and practitioner leaders.

Qualifications and course

The S2C practitioner can have any background. They do not need to be a speech therapist or an occupational therapist or anything along those lines. They do not need any therapeutic background.

Applicants are trained and certified by I-ASC in a six and half month training course to become an S2C practitioner, which includes a short internship. New practitioners are assigned a mentor so that they can continue to grow and learn. There are currently less than 100 trained S2C practitioners. 


Is Spelling to Communicate Evidence-based?

Spelling to Communicate can become a bit of a controversial topic quite quickly. In this video, I talked about the one study that answered the question, “Is the speller actually the one spelling?” The research used technology to determine if the speller looks at the letter before they select it. This was an important question to answer with a research study because historically, people with non-speaking autism were considered to have low intelligence because they didn’t have a way to communicate their intelligence.

What makes a therapy evidence-based?

When a therapy has been a part of numerous, large, well-designed studies demonstrating that the therapy leads to a positive outcome for treating a specific problem, it is called evidence-based therapy. 

Autism population and evidence-based therapies

Smaller sample size

Autism is heterogeneous, meaning it presents itself in many different ways. What is true for one person with autism isn’t true for another. This means no one therapy is relevant to the entire population of autism. In that vein, not every person with autism would need or want to use the Spelling to Communicate approach. This heterogeneity decreases the population size that can be studied.

Learned sample size

Then comes the interesting issue of how therapies are tested. You need a large enough number of people who know the therapy so that large, well-designed research studies can determine the therapy’s positive outcomes.

So you actually need:

  • People with autism to learn S2C. 
  • And then we need these people to participate in the research studies.

The need for early adapters

This is where early adapters of S2C come in. Right now, people who are learning Spelling to Communicate would be considered early adapters. And scientists need these early adapters in order to do research studies with them.

The chicken or the egg problem

That one research study that was done certainly has given validity to the S2C approach. But in order to be officially classified as an evidence-based therapy, S2C needs numerous research studies. But again, here’s the catch – in order to study it, scientists need people who know the technique. 

So people need to learn S2C even though it is not an evidence-based therapy yet. I would classify S2C as an emerging evidence-based approach for non-speakers with autism.

If you are a parent, ask your child to see if this is something that they would like to try to learn. It takes time and effort to master a communication technique. If nothing has been successful in the past, there is not much of a downside to trying this technique. 

At what age can you start Spelling to Communicate?

At what age can you start S2C? Is S2C only for those with autism? Is S2C only for those who are nonverbal or non-speaking? Those are great questions, so let’s get right into them.

At what age can you start S2C?

Typically, students of S2C are five years or older. Why is that? It’s good to give your child ample time to grow from traditional speech therapy – OT, PT… Early intervention does make a difference, so it’s important to use those services.

Sometimes at age four, if there hasn’t been much change, certain exercises can be done in preparation for S2C. But traditionally, S2C can only be started at five years old.

Is S2C only for those with autism?

Short answer, no. The majority of children and people learning S2C are non-speaking people with autism. Some people with autism can speak, but they have difficulty saying what they want or truly mean. They too can use S2C to communicate.

However, anyone who has motor difficulties can explore S2C and see if it would benefit them.

Is S2C only for those who are nonverbal?

S2C is for those who are non-speaking, minimally speaking, or unreliably speaking. This is true for most AAC approaches. 

The term nonverbal is being replaced with the term non-speaking. Self-advocates have said that non-speaking more accurately describes their experience. Nonverbal, they feel, diminishes their intelligence and ability to understand the environment around them. And once many of these non-speakers start communicating, you will be aware of how aware they have been this whole entire time. 

Therefore, S2C is for those who are not speaking, minimally speaking, or unreliably speaking, with or without autism.

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