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  Assistive Technology in AAC

  
  Module 5

  Assistive Technology in AAC

  Assistive Technology in AAC (Augmentative and Alternative Communication) is the set of resources, strategies, and technologies created to help people who have difficulty or are unable to speak and/or write to communicate. It is anything that augments or replaces speech and writing to ensure functional communication and social participation. It can be used by children, young people, adults, or the elderly. 

  The objectives of Assistive Technology in AAC (Augmentative and Alternative Communication) are:

  • Guarantee the right to communication; 

  • Promote autonomy and independence; 

  • Facilitate social interaction; 

  • Ssupport school learning and improve quality of life.

   So:

  - Augmentative Communication: complements speech (when the person speaks little or in a way that is not very intelligible).

   - Alternative Communication: replaces speech (when the person does not speak).

  Who can benefit?

  People with:

  • Autism Spectrum Disorder (ASD);

  • Cerebral palsy;

  • Down syndrome;

  • Aphasia (post-stroke);

  • Neuromotor diseases;

  • Intellectual disability;

  • Apraxia of speech, among others.

  1. WHAT CONSTITUTES ASSISTIVE TECHNOLOGY IN ACC?

  1. LOW- TECH AAC

  Low-tech Augmentative and Alternative Communication includes communication tools that do NOT use electronics, batteries, or computers. They help people who have difficulty speaking communicate their needs, thoughts, and feelings. Non-electronic tools that support communication:

  Examples:

   - Picture cards or communication boards

  

   - PECS (Picture Exchange Communication System) cards

  

   - Symbol books;

  

   - Alphabet boards for spelling words;

     

   - Printed choice boards (yes/no, food, feelings, activities)

  

   

  

   - Gesture or sign systems used with visuals

  

   - Written choice boards

  

  2. HIGH-TECH AAC

  High-tech AAC refers to Augmentative and Alternative Communication systems that use electronic or computerized devices to help someone communicate. Unlike low-tech AAC, these devices can produce speech, generate text, or offer dynamic visual displays. Electronic or digital devices that produce speech or text. They use electronic devices:

  • AAC applications on tablets and cell phones;

  • Communicators with synthesized voice;

  • Software with symbols, photos, text, and áudio;

  • Systems controlled by touch, gaze, or scanning.

  Examples:

   - Speech-generating devices (SGDs)

  

  - AAC apps on tablets or phones

  

   

   - Text-to-speech software

  

  
  
  

   - Switch-activated communication devices

  

  
  
  
  
  
  
  
  

  2. HOW IS THE TECNOLOGY SELECTED?

  Selecting the right AAC technology is a careful, individualized process. It’s not just about choosing a device or app - it’s about matching the person’s needs, abilities, and environment. Here’s a detailed breakdown:

   

  1. Check-list: Criteria for Selecting CAA Software

  Evaluation Criteria	TD Snap (Tobii Dynavox)	LetMeTalk
  User Profile	From beginner to advanced user (focus on literacy).	Users who need basic and direct communication.
  Basic Vocabulary	Includes Core First (based on key/essential words)	Empty grid to be built or very simple categories.
  Customization	Highly customizable (grid size, colors, grammar).	Basic customization (add photos and organize folders).
  Voice Synthesis	High-quality voices (including children's voices in Portuguese)	It uses the system's voice engine (Google/iOS).
  Access Methods	Full support for Direct Selection, Scanning, and Eye Control.	Focused on Direct Selection (touch screen).
  Cost and Platform	Paid (License). Available for Windows and iPad.	Free. Available for Android and iOS.
  Continuity	It allows the user's linguistic skills to grow for years to come.	Limited for users who progress to complex sentences.

   

  3. PRATICAL ACTIVITIES  

  ACTIVITIE 1

  Activity: “Exploring Assistive Technology in AAC”

  Objective: To provide students with hands-on experience using various Augmentative and Alternative Communication (AAC) tools, allowing them to understand different input methods, explore device capabilities, and evaluate their effectiveness for different communication needs.

  Detailed Description: Students will explore a variety of AAC applications and devices to understand how technology can support communication for individuals with speech or language impairments. The activity will be conducted in small groups, and each group will have access to one or more devices or apps.

  We need tablets or computers with AAC apps (Proloquo2Go, TouchChat HD, CoughDrop, Grid 3, Clicker Communicator), eye-tracking devices (e.g., Tobii Dynavox), switches or adaptive controllers, printed symbol boards, projector or screen.

   

                           

     Proloquo2Go                                                        TouchChat HD

  
  
  
  

  ACTIVITIE 2

  TD Snap software (or similar dynamic grid software)

  Activity: “My Digital Routine”

  Objective: Learn to prioritize vocabulary and create logical navigation paths between pages.

  Detailed Description:

  Students must set up a personalized communication page for a "Lunch in the Canteen" scenario. They must select core vocabulary symbols (e.g., want, more, eat, finish) and peripheral vocabulary symbols (specific foods).

  

   

  ACTIVITIE 3

  Software LetMeTalk (Android/iOS)

  Activity: “Communication in Mobility”

  Objective: Practice agility in assembling simple sentences on mobile devices.

  Detailed Description:

  Using a tablet or smartphone, students should create a quick profile for a trip to the park. They should organize categories by color (e.g., verbs in green, nouns in yellow) and test the synthesized voice in different tones.

   

                                      

   

   

  ACTIVITIE 4

  Actuators and Access Interfaces

  Activity: “Cause and Effect and Sweeping”

  Objective: Understanding the timing calibration and motor effort required for access.

  Detailed Description: 

  Connect a switch to a computer via an interface. The student must configure the scanning time in software so that a user with reduced mobility can select an item.

  

  ACTIVITIE 5

  Activity: “AAC device testing”

  Objective: Exploring different augmentative communication technologies

  Detailed Description: Introduce different devices and applications (such as Tobii Dynavox, Proloquo2Go, Snap + Core First) and allow students to explore how they work.

  
  
  

                     

               Tobii Dynavox                                                        Proloquo2Go

  
  
  
  

  

  Snap + Core First

      

  
  
  

  3.1.ASSISTIVE TECHNOLOGY IN ACC: Apps and Input Modes

  This table presents Augmentative and Alternative Communication (AAC) applications, the input modes they support, and suggestions for classroom exploration.

   

  App / Platform	Platform	Input Methods	How to Explore in Class	Class Notes
  Proloquo2Go	iOS	Touch	Create sentences using symbols; experiment with different button layouts	Good for beginners; customizable
  TouchChat HD	iOS	Touch	Set up a dialogue in pairs using the app	Offers a wide vocabulary and various themes
  CoughDrop	iOS / Android / Web	Touch, Switch (via accessibility)	Test sending simple messages using tablet or switch	Cloud-based; allows collaboration between devices
  Tobii Dynavox Compass / Snap + Core First	Windows / iOS (with Eye Tracker)	Eye-tracking, Touch	Demonstrate symbol selection using only gaze	Ideal for users with limited mobility; requires Tobii hardware
  Look to Learn	Windows	Eye-tracking	Eye-tracking exercises, simple games	Initial training in eye-tracking
  Grid 3	Windows / iOS (via emulation	Touch, Switch, Eye-tracking	Create communication grids adapted for students; test switch	Supports multiple input methods in one app
  GoTalk Now / Jabbla	iOS / Windows	Touch, Switch	Explore sentences and stories using switch or touch	Good for classroom communication simulation
  Clicker Communicator	iOS / Windows	Touch, Switch, Eye-tracking	Try each input method using the same board	Allows comparison of ease between input methods
  Apple Switch Control / Android Accessibility Suite	iOS / Android	Switch, Gestures, Touch	Use to control AAC apps with different input methods	Useful to demonstrate accessibility without specialized apps

  
  
  

  4. CASE STUDY

  4.1. Case A: Simon

  - Age: 5 years old.

  - Context: Diagnosis of Autism Spectrum Disorder (ASD). He has good fine motor skills, but does not use functional speech to express basic needs.

  - Skills: Identifies photographs of real objects and is beginning to show interest in pictographic symbols. The family is looking for a low-cost solution to use on a cell phone and in daily life.

  - Challenge: To initiate functional communication immediately and without financial barriers.

   

  4.2. Case B: Beatriz

  - Age: 9 years old.

  - Context: Cerebral Palsy (Spastic Tetraparesis). She lacks the fine motor control to touch a tablet screen. She demonstrates excellent cognitive comprehension and a strong desire to interact.

  - Skills: She can perform voluntary and consistent head movements. The school wants her to begin learning sentence structure and grammar.

  - Challenge: Finding a hands-free access method and software that matches her school learning potential.

   

  4.3. Resolution Guide (Proposed Solution)

  For Simon:

  - Suggested software: LetMeTalk.

  - Why? It's free, works well on mobile devices (cell phones) that the family already owns, and allows for quick transition from photos to symbols.

  - Access Interface: Direct Selection (Simon has the motor skills to touch the screen directly).

   

  For Beatriz:

  - Suggested software: TD Snap.

  - Why? It offers native support for complex access methods, and the Core First vocabulary will allow her to develop sentences and keep up with the school curriculum.

  - Access Interface: Indirect Selection (Scanning) via a switch/handle placed near the head or, if budget allows, an eye-tracking system.

   

  4.4. Communication and Participation Journal (CAA)

  USER: __________________________________ Week:   / to / 

  Communication Partner: ___________________________ Local: _____________

  Date	Context / Activity	What were you trying to communicate?	How did you communicate? (Symbol, Gesture, Tablet)	Support Level (Full, Light, or Independent)	Notes (e.g., Were they happy? Was there frustration?)
  /	Example: Snack Time	I wanted more juice.	You selected the "Plus" symbol in TD Snap.	Independent after modeling	He smiled and maintained eye contact.
  /
  /
  /

  4.5.  Student Evaluation Forms

  Worksheet A: Technical Competency Assessment (Practice)

  1. Configuration: Was the student able to import a new symbol into the software? (Yes/No)

  2. Organization: Are the core vocabulary words in fixed positions to favor motor memory? (Scale 1-5)

  3. Voice: Is the chosen voice synthesis appropriate for the age and gender of the hypothetical user? (Justify)

   

  Worksheet B: Implementation Assessment (Case Study)

  • Scenario: "User X is 8 years old and has cerebral palsy."

  • Question 1: Which access method (direct touch or scanning) would you recommend after experimentation?

  • Question 2: Describe how you would perform 'Modeling' (Aided Language Stimulation) during a game activity with this user.

   

  4.6.  Action Plan for Implementation (Detailed)

  1. Needs Assessment: Interview with the family and observation in a natural context.

  2. Tool Selection: Proof of concept with low technology before transitioning to high technology.

  3. Personalization: Insert real photographs of people and objects significant to the user.

  4. Training: 60-minute session with caregivers on how to charge the device and adjust simple buttons.

   

  4.7.  Online Resources and Support Portals (Free Materials)

  ARASAAC (Aragonese Portal for Augmentative and Alternative Communication)

  • What it offers: It's the world's largest free library of pictograms. Includes tools for creating personalized calendars, routines, and communication boards.

  • Site: arasaac.org

  Portal of the INR (National Institute for Rehabilitation – Portugal)

  • What it offers: Updated legislation on Assistive Technologies and the national catalog of assistive technologies. Essential for the Portuguese context.

  • Site: inr.pt

  Project Core (University of North Carolina)

  • What it offers: Resources focused on the "Core Vocabulary" (Essential Words). Offers universal communication trays for printing.

  • Site: project-core.com

  Isaac International (International Society for Augmentative and Alternative Communication)

  • What it offers: The world's leading AAC organization. Excellent for consulting the latest research and best practice guidelines.

  • Site: isaac-online.org

  Anditec (Portugal)

  • What it offers: A leading center in Portugal for Assistive Technologies. It has manuals and demonstrations of software such as TD Snap.

  • Site: anditec.pt

  PrAACtical AAC

  • What it offers: One of the world's best blogs for brokers. It contains daily modeling strategies and classroom activity ideas.

  • Site: praacticalaac.org

  
  
  
  

  Conclusion

  So, Assistive technologies play a fundamental role in supporting the communication of people with speech or language difficulties. In the context of AAC (Augmentative and Alternative Communication), these tools not only expand the capacity for expression, but also promote autonomy, social participation, and inclusion.

  The use of technological resources, such as interactive applications, communication devices, and symbol software, allows children or adults to engage more actively in everyday, school, and family situations. Furthermore, the integration of assistive technology with AAC strategies makes learning more meaningful, motivating, and adapted to individual needs.

  Therefore, investing in assistive technologies for AAC is investing in quality of life, independence, and real communication opportunities, strengthening bonds and expanding horizons of interaction for all users.

  
  
  
  
  
  
  
  
  
  

  Bibliographic References

  American Speech-Language-Hearing Association (ASHA). (n.d.). Augmentative and Alternative Communication (AAC). [Recurso Online]. Disponível em: www.asha.org/public/speech/disorders/aac/

  Basto, R., et al. (2018). Comunicação Alternativa: Teoria e Prática. São Paulo: Editora Memnon.

  Beukelman, D. R., & Light, J. C. (2020). Augmentative & Alternative Communication: Supporting Children and Adults with Complex Communication Needs (5th ed.). Baltimore: Paul H. Brookes Publishing Co.

  Cook, A. M., & Polgar, J. M. (2020). Assistive Technologies: Principles and Practice (5th ed.). St. Louis: Elsevier Health Sciences.

  Martins, N. M. (2014). Tecnologias de Apoio e Processos de Inclusão. Porto: Porto Editora. (Sugestão adicional: É a referência de base em Portugal).

  Schirmer, C. R. (2007). Atendimento Educacional Especializado: Deficiência Física. Brasília: MEC/SEESP.

  Sennott, S. C., Light, J. C., & McNaughton, D. (2016). AAC Modeling with the Aid of Augmentative and Alternative Communication Video Modeling. Research and Practice for Persons with Severe Disabilities, 41(2), 101-115.