Applied Verbal Behavior (AVB): A Parent's Guide to Teaching Language Through ABA
AVB uses Skinner's verbal operants to teach language systematically. Learn about mands, tacts, echoics, and intraverbals — and how they build real communication.
Applied Verbal Behavior (AVB): A Parent’s Guide to Teaching Language Through ABA
TL;DR: Applied Verbal Behavior (AVB) is an approach within ABA therapy that teaches language by focusing on WHY your child communicates, not just WHAT they say. Based on B.F. Skinner’s analysis of language, AVB breaks communication into functional categories called “verbal operants” — mands (requests), tacts (labels), echoics (imitation), and intraverbals (conversational responses). This approach is particularly effective for children with limited or emerging language because it starts with the most motivating form of communication: asking for what you want. This guide explains each verbal operant, how AVB sessions work, and how to support language development at home.
Your child points at the cookie jar and screams. You hand them a cookie. They eat it happily.
Communication happened — but not the kind that will serve them in a classroom, a friendship, or a job interview.
Now imagine: your child sees the cookie jar, says “cookie please” (or selects a cookie icon on their AAC device), receives the cookie, and smiles.
Same outcome. Same cookie. But the path to getting it is a skill that transfers to hundreds of other situations: “water please,” “help please,” “play please,” “more please.”
That’s what Applied Verbal Behavior teaches — not just words, but functional communication organized by purpose.
What Is Applied Verbal Behavior?
AVB Within ABA
AVB isn’t a separate therapy from ABA — it’s an approach WITHIN ABA that uses B.F. Skinner’s 1957 analysis of language (from his book Verbal Behavior) to guide how language is taught.
| Aspect | Traditional ABA Language Teaching | AVB Approach |
|---|---|---|
| Focus | What the child says (vocabulary, sentence length) | Why the child communicates (function of language) |
| Starting point | Often labeling (receptive/expressive ID) | Requesting (manding) — most motivating |
| Organization | By word type (nouns, verbs, adjectives) | By verbal operant (mand, tact, echoic, intraverbal) |
| Motivation | External reinforcement (sticker for saying “ball”) | Natural reinforcement (say “ball” → get the ball) |
| Assessment | Standardized language tests | VB-MAPP (Verbal Behavior Milestones Assessment and Placement Program) |
The Key Insight
Skinner’s insight was that the word “cookie” is actually FOUR different skills depending on WHY the child says it:
- “Cookie!” (pointing at cookie jar, wanting a cookie) → Mand (request)
- “Cookie” (seeing a cookie, labeling it) → Tact (label)
- “Cookie” (repeating after someone says “Say cookie”) → Echoic (imitation)
- “Cookie” (answering “What do you eat after dinner?”) → Intraverbal (conversational)
A child who can say “cookie” in one context may not be able to say it in the others. AVB teaches each operant systematically, starting with the most functional and motivating.
The Verbal Operants Explained
Mand (Request)
What it is: Asking for what you want or need. Why it matters: This is the most powerful form of communication. It gives the child direct control over their environment.
| Examples by Communication Level |
|---|
| Reaching toward a desired item |
| Pointing at a toy |
| Handing a picture card to an adult |
| Saying “ball” when they want the ball |
| ”Can I have the red marker?" |
| "I need help opening this" |
| "Can we go to the park today?” |
Why AVB starts here: Manding is immediately reinforcing — you ask for something and GET it. This builds the connection between communication and getting needs met. Every other form of communication is harder to motivate.
How it’s taught:
- Identify what the child wants RIGHT NOW (observe what they reach for, look at, approach)
- Hold the item, wait for communication attempt
- Prompt the response (word, sign, picture, device)
- Immediately deliver the item
- Fade prompts until the child requests independently
Tact (Label)
What it is: Naming or describing something you see, hear, smell, feel, or experience. Why it matters: Tacting lets your child share their experience of the world with others.
| Examples |
|---|
| ”Dog!” (seeing a dog) |
| “It’s raining” (hearing rain) |
| “That smells bad” (smelling something) |
| “I feel sad” (labeling an emotion) |
| “The car is going fast" |
| "That’s a triangle — it has three sides” |
How it’s taught:
- Present or encounter something in the environment
- Ask “What’s that?” or “What do you see?”
- Prompt the label if needed
- Reinforce with social praise AND/OR a tangible reinforcer
- Practice with varied examples to build generalization
Find ABA providers near you who use verbal behavior approaches to teach communication.
Echoic (Verbal Imitation)
What it is: Repeating what someone else says. Why it matters: Echoic behavior is the foundation for learning new words. If a child can imitate speech, you can prompt new mands and tacts.
| Examples |
|---|
| Adult says “ball” → child says “ball” |
| Adult says “I want juice” → child says “I want juice” |
| Adult says “My name is [child’s name]” → child repeats |
How it’s taught:
- Start with sounds the child already makes
- Gradually shape closer approximations
- Pair with motivating situations (echoic → mand)
- Use fun, sing-song tones that encourage imitation
If your child is non-vocal: Echoic-equivalent skills exist in other modalities — imitating signs, imitating icon selections on AAC, motor imitation. The principle is the same: repeat what you see/hear as a building block for other skills.
Intraverbal (Conversational Language)
What it is: Responding to another person’s language without a visual cue — the basis of conversation. Why it matters: This is the operant that enables back-and-forth communication, answering questions, and social conversation.
| Examples |
|---|
| ”What’s your name?” → “Alex" |
| "Twinkle, twinkle, little…” → “star" |
| "What do you do when you’re hungry?” → “Eat food" |
| "Tell me about your weekend” → [tells a story] |
| Having a conversation about a shared experience |
Why it’s hardest: There’s no visual cue — the child has to retrieve language from memory based on verbal context alone. This is why many autistic children can label hundreds of items (tacts) but struggle to answer “What did you do at school today?” (intraverbal).
How it’s taught:
- Start with fill-ins using highly familiar material (“Ready, set, ___”)
- Build to simple questions with known answers (“What’s your name?”)
- Gradually increase complexity (“What do you do at school?”)
- Teach WH-questions systematically (who, what, where, when, why, how)
- Build toward conversational exchanges
Other Verbal Operants
| Operant | Definition | Example |
|---|---|---|
| Textual | Reading written words aloud | Seeing “EXIT” and saying “exit” |
| Transcription | Writing or typing what is heard | Hearing “cat” and writing “cat” |
| Copying text | Reproducing written text | Copying a sentence from the board |
| Listener responding | Following instructions or responding to others’ language | ”Give me the red one” → gives red item |
How AVB Sessions Work
Assessment: The VB-MAPP
Most AVB programs start with the VB-MAPP (Verbal Behavior Milestones Assessment and Placement Program), which measures:
- Current level of each verbal operant
- Barriers to language learning
- Transition readiness (toward less restrictive settings)
The VB-MAPP organizes skills into three developmental levels:
- Level 1 (0-18 months developmental): Basic mands, tacts, echoics, listener responding
- Level 2 (18-30 months): Expanding vocabulary, intraverbals begin, social skills, play
- Level 3 (30-48 months): Complex language, conversation, reading, writing, classroom skills
Session Structure
A typical AVB session blends structured teaching with natural opportunities:
Structured teaching (Intensive Teaching):
- Rapid trials at the table or in a structured area
- Target specific operants with clear prompts and reinforcement
- Data collection on each trial
- Interspersed with mastered skills (to maintain motivation)
Natural Environment Teaching (NET):
- Follow the child’s motivation
- Create communication opportunities during play and daily activities
- Capture natural manding opportunities
- Practice tacting during exploration
- Build intraverbals through play narratives
The ratio varies by child: Children just beginning language may spend 70% of time in NET (building motivation and basic mands) and 30% in structured teaching. More advanced learners may flip this ratio.
How It Differs from Speech Therapy
| AVB (ABA) | Speech-Language Therapy |
|---|---|
| Focuses on function of language | Focuses on form of language (articulation, grammar) |
| Uses behavioral principles (reinforcement, prompting, shaping) | Uses linguistic/motor approaches |
| Typically 10-40 hours/week as part of comprehensive ABA | Typically 1-3 hours/week |
| Delivered by RBTs supervised by BCBAs | Delivered by SLPs |
| Data-driven (trial-by-trial data) | Progress monitoring (standardized tests) |
| Covers all verbal operants | May focus more on expressive/receptive language |
Best practice: AVB and speech therapy work together. The SLP addresses articulation, oral motor skills, and language structure. The ABA team builds functional use across settings. When both teams coordinate, progress accelerates.
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Supporting Language Development at Home
Creating Manding Opportunities
The most impactful thing you can do at home: make your child NEED to communicate.
Strategies:
- Put desired items in view but out of reach
- Give small portions (one chip at a time → they have to ask for more)
- “Sabotage” routines (give cereal without a spoon → they need to request)
- Offer choices (“Do you want milk or juice?”)
- Pause during favorite activities (push on swing, stop → wait for request to continue)
- Keep favorite items in clear containers they can’t open
Critical rule: Accept ANY communication attempt. If your child reaches, points, vocalizes, signs, or uses their device — honor it. The goal is to build the connection between communicating and getting what you want. Refine the form later.
Building Tacts Throughout the Day
- Label everything during daily routines: “Shoes on! Red shoes. We’re going outside.”
- During walks: “I see a bird! A big bird. It’s flying.”
- During meals: “This is hot soup. It smells good.”
- Read books and label pictures together
- Pause and point: “What’s that?” Give time, then model if needed
Supporting Intraverbals
- Sing songs with fill-ins: “The wheels on the bus go round and ___”
- Play simple question games: “What does a cow say?”
- Talk about the day: “First we ate breakfast, then we ___”
- Share your own experiences: “I went to the store. I bought ___. Guess what?”
- Use special interests as conversation topics
If Your Child Uses AAC
All verbal operants apply equally to AAC users:
- Manding on AAC: Navigate to the “food” page, select “cookie”
- Tacting on AAC: See a dog, select “dog” on the device
- Intraverbal on AAC: Answering “What do you want for lunch?” by navigating to food options
- Model AAC use yourself — pick up the device and show them
Common Misconceptions
”AVB is only for nonverbal children”
False. AVB is for anyone learning language at any level. Advanced AVB targets complex intraverbals, abstract language, figurative speech, and social conversation. A child who can speak but can’t maintain a conversation has intraverbal deficits that AVB addresses.
”If I teach my child to request, they’ll just demand things all day”
Manding is the starting point, not the endpoint. Once basic mands are established, the program quickly expands to other operants. A child who can mand is a child who has discovered that communication WORKS — and that discovery opens the door to all other language.
”AVB means lots of flashcards and table work”
Modern AVB emphasizes Natural Environment Teaching alongside structured teaching. Pivotal Response Training, incidental teaching, and play-based learning are all part of AVB when done well. If your child’s program is only table work, ask your BCBA about increasing NET.
”My child scripts from TV. That’s not real language”
Scripting (delayed echoic behavior) IS a verbal skill — it’s just not being used functionally yet. AVB can shape scripts toward functional use: if your child says “To infinity and beyond!” when excited, that emotional expression can be acknowledged and expanded. Many autistic people use scripting as a foundation for developing more spontaneous language.
Frequently Asked Questions
At what age should AVB start?
As early as possible. Early intervention with a verbal behavior focus can begin as young as 12-18 months if language delays are identified. The VB-MAPP Level 1 starts at the 0-18 month developmental level, so it’s appropriate for very young children or children at early developmental stages regardless of chronological age. ABA for toddlers often uses AVB as the primary framework.
How is AVB different from PECS (Picture Exchange Communication System)?
PECS is a specific AAC system that teaches communication through picture exchange — it primarily targets manding (requesting). AVB is a comprehensive framework for ALL verbal operants. Many AVB programs USE PECS as one tool for building mands, but AVB goes far beyond requesting to include labeling, answering questions, conversing, and all other language functions.
My child has lots of words but can’t have a conversation. Can AVB help?
Yes — this is a classic intraverbal deficit. Your child may have strong tacting (labeling) and echoic (imitation) skills but weak intraverbal skills. AVB specifically targets intraverbal development through systematic teaching of question-answering, fill-ins, topic maintenance, and conversational reciprocity. This is actually one of the most common referral reasons for older, verbal autistic children.
Does the VB-MAPP replace other assessments?
The VB-MAPP is the primary assessment for AVB-based programs, but it doesn’t replace standardized language tests (administered by SLPs) or other ABA assessments like the ABLLS-R. Your BCBA may use the VB-MAPP alongside other tools. The VB-MAPP is specifically designed to guide ABA programming, not to provide a language diagnosis.
How do I know if my child’s ABA program uses AVB?
Ask your BCBA: “Do you use a verbal behavior framework?” and “Which assessment do you use — VB-MAPP, ABLLS-R, or something else?” If they use the VB-MAPP and organize language goals by verbal operant (mand, tact, echoic, intraverbal), they’re using an AVB approach. If language goals are organized only by vocabulary or sentence length without reference to function, they may not be using AVB specifically.
Browse ABA clinics near you that use Applied Verbal Behavior approaches for comprehensive language development.