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AAC Path Pages


The language available on an AAC tool, as well as the literacy capability of the system (e.g., keyboard pages) are referred to in many sources as the "selection set".  The selection set refers to the items (e.g. the words, the phrases) that are available on the tool for communication.   There are several features that characterize different selection sets, including types of symbols, vocabulary size, and the way messages are retrieved.  Some AAC tools or techniques involve a very simple selection set; others have a large and complex set. 

Food for Thought

Although the language features of the AAC tools on the market have progressed quite a bit over the last few decades, these symbol vocabularies are quite limited for communicators who do not yet have literacy skills when you compare them to communicators who do not rely on AAC.  To envision these remaining limitations, consider the language available at all times  to individuals who can speak, read, and write:

  1. Speakers generally have a huge vocabulary to choose from: Did you know that the standard desktop dictionary has 150,000 words in it? And in English, the common "everyday vocabulary" includes approximately 20,000 words?

  2. A speaking vocabulary is available immediately whereas AAC vocabulary has to be located and then retrieved for production. That slows down communication considerably.

  3. Speakers do not have to be able to recognize symbols that represent the words they want. Toddlers have a very large vocabulary well before they can recognize all the pictures or words for these concepts. AAC users have to be able to recognize either a visual or an auditory symbol in their selection set to make a choice.

Keep these things in mind as you look at the following language features:


examples of language layouts on common systems


The language and literacy features identified as needed in an AAC tool are based on a thorough picture of the communicator's current skills and needs, compared to age expectations and daily living.  We can get this thorough picture through comprehensive assessment strategies and a firm understanding of typical communication development.  Scroll and click on a feature you want to know more about.  


Finding an AAC tool with language and literacy features that generally fit the skills and needs of a communicator is the first step in providing access to relevant and appropriate language for growth into communicative independence.  However,  we can't rely entirely on the pre-programmed language found in  AAC tools and must consider how to select and customize vocabulary.  Scroll and click on  vocabulary selection resource below to explore it.   


Vocabulary Size

For the sake of simplicity, let’s explore vocabulary size using some rather arbitrary categories. . For this learning purpose, we’ll identify a  "tiny" vocabulary as a selection set with fewer than 15 items available to the user. A "small" vocabulary is anything between 15 and 99 items. A "moderate" vocabulary has between 100 - 250 items, while a "substantial" vocabulary has more than 250 items in the selection set. Remember, speaking individuals have vocabularies of many hundreds of thousands of words; AAC vocabularies are very limiting under the best of circumstances when literacy is not yet present.  It is important to note that many “apps” and “devices” may offer page sets (also called “Vocabularies” or “Arrays”) that span the range of tiny to substantial.  Many also offer the ability to add new words to the existing selection set.   In selecting language features for a communicator, we consider their skills and needs and choose a “page set” that meets those needs within an app or device.  If we are lucky, there are other page sets available on the same system that will grow with the communicator, or we may decide to go with a more “complex” page set and use some of the customization features like hiding buttons to help reduce the vocabulary at first, if team assessment reveals this is recommended.  You can learn more about considerations for customizing AAC tools on this AAC Path Page. 

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Explore Vocabularies

Scroll through the gallery to see some examples of different tools that offer a variety of different vocabulary sizes and layouts.  This is not an exhaustive list but is meant to give you a brief sample of the vocabulary diversity across some common AAC tools.  This gallery does not serve as endorsement over these products over others not listed.  AAccessible does not have a relationship with any of the AAC developers who provide these products.