RBT Behavior Acquisition Study Guide — Unit C (2026 Task List)

Content reviewed by James Fuller, BCBA · Last updated July 15, 2026 · Aligned to BACB RBT Test Content Outline (3rd Edition)

Quick Answer

Behavior Acquisition (Unit C) is the largest section of the RBT exam, accounting for 19 out of 75 scored questions (25%). It covers 11 tasks including positive and negative reinforcement, conditioned reinforcers, discrete-trial teaching (DTT), naturalistic teaching (NET), chaining, discrimination training, prompt fading, generalization, maintenance vs acquisition, shaping, and token economies. RBTs implement these teaching procedures exactly as written by the supervising BCBA. Also commonly referred to as “Skill Acquisition” in study materials.

Behavior Acquisition — also commonly called Skill Acquisition — is the section that decides most RBT practice exam outcomes. It’s the largest domain on the exam at 25% of scored questions, and the concepts here build on top of one another in ways the other units don’t. If you’re preparing for the exam, this is where focused study delivers the biggest payoff.

The BACB updated the RBT Test Content Outline for the 2026 exam, and this unit now contains exactly 11 tasks numbered C.1 through C.11. Master these and you’re most of the way to passing. To measure your readiness after studying, take a full-length 85-question practice exam, or browse every study resource at our free RBT practice test hub.

This guide covers all 11 tasks in exactly the order the BACB lists them, with definitions, real clinical scenarios, comparison tables, and exam traps to avoid. Everything is reviewed by James Fuller, BCBA.

One note on terminology: BACB officially calls this domain “Behavior Acquisition,” but most study materials use “Skill Acquisition.” Both terms refer to the same 11 tasks. This guide uses BACB’s official term while staying accessible to candidates who learned the alternate name.

Quick Facts About Unit C — Behavior Acquisition

• Number of scored questions: 19 out of 75 (25% of the exam)
• Total tasks in this domain: 11 (numbered C.1 through C.11)
• Effective Test Content Outline: 3rd Edition (in effect for 2026 exams)
• Recommended study time: 10-15 hours (more than any other unit)
• Difficulty level: High — most conceptually dense unit
• Core procedures tested: reinforcement, conditioned reinforcers, DTT, NET, chaining, discrimination training, prompt fading, generalization, maintenance, shaping, token economies
• Most common exam trap: Answers where the RBT modifies the plan instead of implementing as written

What Is Behavior Acquisition in ABA?

Behavior Acquisition is the systematic teaching of new behaviors that improve a client’s functional independence. In practice, this means teaching communication, self-care routines, social interaction, academic responding, and daily living tasks — behaviors the learner cannot yet perform reliably.

Every acquisition program follows the same logic: identify the target behavior, use reinforcement contingent on correct responses, prompt when necessary, fade prompts systematically, and collect data throughout so the BCBA can determine what’s working.

Important Distinction

Behavior Acquisition (Unit C) teaches new behaviors. Behavior Reduction (Unit D) decreases existing problem behaviors. Both use reinforcement, but with opposite goals — you’re building something up or bringing something down.

Your role as an RBT during acquisition procedures is straightforward but demanding: implement the plan exactly as the BCBA designed it, collect accurate data on every trial, and communicate what you’re seeing. When something isn’t working, you document it and refer to your supervisor — you don’t independently change the procedure.

The 11 Tasks in Unit C (Per BACB 3rd Edition)

The BACB Test Content Outline (3rd Edition) organizes Behavior Acquisition into 11 specific tasks. Each task represents a competency you must be able to demonstrate or identify in exam scenarios.

1. C.1 — Implement positive and negative reinforcement procedures (e.g., immediately, contingently, according to schedules of reinforcement) along a continuum of dimensions (e.g., magnitude, intensity, variety)
2. C.2 — Implement procedures to establish and use conditioned reinforcers
3. C.3 — Implement discrete-trial teaching procedures
4. C.4 — Implement naturalistic teaching procedures (e.g., incidental teaching, natural environment training)
5. C.5 — Implement task analyzed chaining procedures (e.g., forward, backward, total task)
6. C.6 — Implement discrimination training
7. C.7 — Implement procedures using stimulus and response prompts that include appropriate fading procedures (e.g., errorless, least-to-most, stimulus fading, time delay)
8. C.8 — Implement generalization procedures (e.g., conduct intervention procedures across settings, people, and stimuli)
9. C.9 — Distinguish between maintenance and acquisition procedures
10. C.10 — Implement shaping procedures
11. C.11 — Implement token economies

Reinforcement Procedures (C.1)

Task C.1 is broad. It covers both positive and negative reinforcement, and requires you to deliver reinforcement immediately, contingently, and according to specific schedules — while varying along dimensions like magnitude, intensity, and variety.

Positive vs negative reinforcement

Positive reinforcement means adding something after a response to increase that response. A learner completes a task and receives praise or a preferred item.

Negative reinforcement means removing something aversive after a response to increase that response. A learner asks for a break using their communication device, and the demand is temporarily removed.

Both types increase the future frequency of the target behavior. The difference is whether something is added or removed after the response.

Immediate and contingent delivery

Two words matter most: immediate and contingent.

Immediate means within 1-2 seconds of the correct response. Any longer and the reinforcement contingency weakens — you may accidentally reinforce whatever behavior happened between the response and the delivery.

Contingent means the reinforcer is delivered only after the target response. Not before. Not “just because.” Contingent delivery is what strengthens the target behavior specifically.

Schedules of reinforcement

• Continuous reinforcement (CRF) — reinforcement after every correct response. Used during initial acquisition.
• Fixed ratio (FR) — reinforcement after a set number of responses (FR-5 = every 5th correct response).
• Variable ratio (VR) — reinforcement after a variable number of responses averaging a set number. Produces the highest, steadiest response rates.
• Fixed interval (FI) — reinforcement for the first correct response after a fixed time has passed.
• Variable interval (VI) — reinforcement for the first correct response after a variable time period.

Dimensions of reinforcement

Task C.1 specifically mentions varying reinforcement along dimensions:

• Magnitude — how much or how big the reinforcer is
• Intensity — the strength or salience of the reinforcer
• Variety — using multiple reinforcers to prevent satiation

Exam Trap

Delayed reinforcement is one of the most tested procedural errors. Any scenario mentioning delays of 5, 8, or 10 seconds after a correct response should trigger the answer “deliver reinforcement immediately.”

Establishing and Using Conditioned Reinforcers (C.2)

Task C.2 focuses on conditioned reinforcers — stimuli that acquire reinforcing value through association with other reinforcers.

Unconditioned vs conditioned reinforcers

Unconditioned (primary) reinforcers have reinforcing value without any prior learning. Food, water, warmth, and physical comfort are examples. These work biologically.

Conditioned (secondary) reinforcers gain their reinforcing value through repeated pairing with existing reinforcers. Praise, tokens, checkmarks, high-fives — none of these have inherent value. They work because they’ve been paired with things that do.

How to establish a conditioned reinforcer

1. Present the neutral stimulus (like a checkmark on a sticker chart)
2. Immediately follow it with a known reinforcer (like a favorite snack)
3. Repeat this pairing consistently across many trials
4. Gradually the neutral stimulus alone becomes reinforcing

Once established, conditioned reinforcers are useful because they’re portable, quick to deliver, and don’t cause satiation the way primary reinforcers do.

The key risk

Conditioned reinforcers must be periodically re-paired with primary reinforcers or they lose their value over time. A sticker that’s never exchanged for anything eventually stops motivating the learner.

Discrete-Trial Teaching / DTT (C.3)

DTT is a highly structured teaching approach where each learning opportunity is broken into a distinct, repeatable trial. It’s one of the most heavily tested procedures because it appears in many exam scenarios.

The four components of a DTT trial

1. Discriminative Stimulus (SD) — the instruction, question, or cue that signals a response is expected. Example: showing a red card and asking “What color?”
2. Response — what the learner does (correct, incorrect, or no response)
3. Consequence — reinforcement for correct; error correction or no reinforcement for incorrect
4. Inter-Trial Interval (ITI) — a brief pause (usually 3-5 seconds) before the next trial begins

The ITI is easy to overlook and heavily tested. Without it, trials blur into each other and the SD loses its discriminative power. A scenario where the RBT delivers the next SD immediately after reinforcement, with no pause, is a procedural error the exam will ask you to identify.

When DTT is the right choice

• Foundational skills that need many repetitions
• Simple discrete responses (colors, numbers, matching, receptive labels)
• Learners who benefit from structure and predictability
• Skills where the natural reinforcer isn’t strong enough to drive learning

When DTT struggles

• Spontaneous communication skills (better taught with NET)
• Complex social interactions (need real contexts)
• Learners who resist structured tabletop settings
• Skills that must generalize across many settings from the start

Naturalistic Teaching Procedures / NET (C.4)

Task C.4 covers naturalistic teaching, which the BACB describes as including “incidental teaching, natural environment training.” NET embeds instruction into whatever the learner is already interested in doing.

The core insight of NET

Motivation is the strongest teaching tool available. When you follow the learner’s existing motivation instead of manufacturing it artificially, learning tends to happen faster and generalizes more naturally.

How NET works in practice

A child is playing with toy cars, fully engaged, actively reaching for specific vehicles. This is when a request (mand) can be taught in a way that will actually stick. The RBT holds up a specific car she’s reaching for and waits — creating a learning opportunity. When she says “car” (or attempts to), the RBT immediately hands over the car. The car itself is the reinforcer.

DTT vs NET side-by-side

Content reviewed by James Fuller, BCBA · Last updated July 15, 2026 · Aligned to BACB RBT Test Content Outline (3rd Edition)

Task Analyzed Chaining Procedures (C.5)

Task C.5 covers “task analyzed chaining procedures (e.g., forward, backward, total task).” Chaining teaches multi-step behaviors by breaking a complex task into individual steps.

Task analysis comes first

Before chaining begins, the BCBA creates a task analysis — a written list of every step. Example for handwashing:

1. Turn on the faucet
2. Wet hands under the water
3. Apply soap
4. Rub hands together for 20 seconds
5. Rinse hands
6. Turn off the faucet
7. Dry hands

Forward chaining

Teach step 1 first, to independence. Then add step 2 (with prompts on remaining steps). When step 2 is independent, add step 3. Build forward.

Example: Teaching a peanut butter sandwich. First, the learner masters “get bread from the bag.” Only after this is fluent do you introduce “open the peanut butter jar.”

Backward chaining

Teach the last step first. The RBT prompts every other step, so the learner only performs the final step independently to complete the task and receive reinforcement.

Example: Shoe tying. The RBT guides the learner through crossing laces, making loops, and threading them. The learner independently pulls the loops tight — getting the reinforcement of a completed knot on every trial.

Total task chaining

The learner attempts every step on every trial. The RBT prompts only the steps where the learner struggles.

Example: Handwashing with a learner who can already turn on the faucet and use soap independently but needs help remembering to rub for 20 seconds. The RBT lets them run the entire chain, prompting only the rubbing step.

Exam Trap

Focus on which specific step the learner completes independently while others are prompted. Independent last step → backward. Independent first step, building sequentially → forward. Independent most steps with prompts only on weak ones → total task.

Discrimination Training (C.6)

Discrimination training teaches the learner to respond correctly to one specific stimulus while not responding to similar-but-different stimuli. Teaching a learner to identify “cat” from an array of animal pictures is discrimination training.

Two rules that make discrimination training work

1. Rotate positions. If the correct card is always on the left, the learner learns “pick left” instead of “pick cat.” Rotating positions controls for position bias.
2. Use varied incorrect options. If “cat” is always paired with the same wrong options, the learner memorizes the array rather than truly discriminating the target.

The successful discrimination test

A learner has mastered discrimination when they respond correctly to the target stimulus in random positions, paired with different distractor items, across multiple sessions.

Prompts and Prompt Fading Procedures (C.7)

Task C.7 covers “stimulus and response prompts that include appropriate fading procedures (e.g., errorless, least-to-most, stimulus fading, time delay).” Every prompt has an expiration date — the goal is to fade it so the learner responds to the natural SD alone.

The response prompt hierarchy (least to most intrusive)

1. Gestural prompt — pointing, nodding, motioning toward the correct answer
2. Verbal prompt — saying the answer, a partial hint, or a spoken cue
3. Model prompt — demonstrating the response for the learner to imitate
4. Partial physical prompt — light physical guidance to initiate the response
5. Full physical prompt — hand-over-hand guidance through the entire response

Stimulus vs response prompts

• Response prompts — added to the learner’s response (all of the above)
• Stimulus prompts — modifications to the SD itself. Placing the correct card closer, making it brighter, or larger.

Four prompt fading procedures (per BACB C.7)

Errorless learning

Use immediate prompts on every trial to prevent errors during acquisition. Fade prompts systematically as competence develops.

Least-to-most prompting

Present the SD. Wait about 3 seconds. If no response, add the mildest prompt. If still no response, add a stronger prompt. Promotes independence when the learner is ready.

Stimulus fading

Gradually reduce the intensity or salience of a stimulus prompt across trials. If a correct card was highlighted bright yellow, fade to lighter yellow, then no highlight.

Time delay procedures

• Constant time delay: Present the SD, wait a fixed number of seconds (e.g., 4), then prompt if no response. Same delay every trial.
• Progressive time delay: Start at 0-second delay (immediate prompt). Gradually increase to 1, 2, 3, 4 seconds across trials.

Key Concept

The goal of every prompt fading procedure is stimulus control transfer — shifting control of the response from the prompt to the natural SD. When the learner responds correctly with no prompt, stimulus control has transferred.

Generalization Procedures (C.8)

Task C.8 covers “generalization procedures (e.g., conduct intervention procedures across settings, people, and stimuli).” A skill isn’t fully mastered until it transfers to new contexts.

Two types of generalization

• Stimulus generalization — the same response transfers to new stimuli, settings, people, or times. A learner who greets the RBT in the therapy room and then greets the same RBT at the grocery store has generalized across settings.
• Response generalization — the topography of the response varies while achieving the same function. A learner taught to say “hi” who now says “hey,” “hello,” and “what’s up” has generalized across response forms.

How RBTs support generalization

• Vary the materials used during teaching
• Practice in multiple physical settings, not just the therapy room
• Have different people run trials — parents, other RBTs, teachers
• Fade artificial reinforcers toward natural ones
• Systematically introduce new stimuli that share features with training stimuli

Distinguishing Maintenance from Acquisition (C.9)

Task C.9 asks you to distinguish between maintenance procedures and acquisition procedures — two different phases of learning that require different RBT actions.

Acquisition

The initial learning phase. The learner does not yet reliably perform the target behavior. Procedures include:

• Continuous or dense reinforcement schedules
• Frequent prompting
• Errorless learning approaches (when appropriate)
• Data collection on every trial

Maintenance

The persistence of a skill over time after mastery. The learner already reliably performs the behavior. Procedures include:

• Thinner reinforcement schedules (intermittent instead of continuous)
• Little to no prompting
• Periodic maintenance probes rather than daily practice

Common Confusion

Maintenance means the skill persists over time. Generalization (C.8) means the skill transfers across settings, people, or stimuli. They’re related but distinct — a skill can maintain in one setting without generalizing to others.

Shaping Procedures (C.10)

Task C.10 covers shaping — teaching a new behavior by reinforcing successive approximations toward the target. Each approximation must be closer to the goal than the previous one.

Shaping a vocalization: step by step

1. Reinforce any vocalization (grunts, sounds, mouth movements)
2. Reinforce only word-like sounds
3. Reinforce only “coo” or “cook”
4. Reinforce only “cookie”

Shaping is not chaining

• Chaining (C.5) teaches a multi-step sequence — each step is a distinct behavior
• Shaping (C.10) refines a single response across time — each approximation is a version of the same behavior

Teaching a child to say “cookie” through progressively better attempts is shaping. Teaching a child to make a sandwich by mastering “get bread,” then “open jar,” then “spread” is chaining.

Token Economies (C.11)

Task C.11 covers token economies. A token economy uses tokens (points, stickers, chips, checkmarks) as conditioned reinforcers that the learner exchanges for backup reinforcers at scheduled times.

Five components of every token economy

1. Target behaviors — what earns tokens
2. Tokens — the physical or visual items used
3. Backup reinforcers — what tokens can be exchanged for
4. Exchange rate — how many tokens equal what backup
5. Exchange schedule — when exchanges happen

The most common token economy failure

Satiation on the backup reinforcer is the most common problem. A child who eagerly worked for candy tokens two weeks ago now refuses to work — the candy has lost its value. The tokens aren’t broken; the currency they buy has depreciated. Solutions include rotating backup reinforcers, running a new preference assessment, or offering a token exchange menu with multiple options.

What RBTs Can and Cannot Do in Behavior Acquisition

Every RBT exam includes scope-of-practice questions where the wrong answer sounds reasonable but crosses a boundary.

What RBTs do

• Implement teaching procedures exactly as the BCBA wrote them
• Collect accurate data on every trial or session
• Report progress, challenges, and unusual observations to the BCBA
• Prepare materials and reinforcers before sessions
• Maintain client dignity and professional boundaries

What RBTs don’t do

• Design or modify skill acquisition plans independently
• Choose which teaching procedures to use
• Interpret assessment data or make clinical recommendations
• Discontinue procedures because they’re not working
• Advise families on plan changes or treatment direction

The Big Exam Trap

Watch for answers where the RBT changes the plan independently. Even when the plan appears not to be working, even when the family requests changes — the correct answer is almost always to document observations and refer to the BCBA.

How to Study Unit C Efficiently

Behavior Acquisition is 25% of the exam — the largest single domain. Return on time invested here is the highest of any unit.

Step 1: Learn all 11 tasks by number

You should be able to state what C.1 through C.11 cover without looking. Because test items are organized by these task numbers, knowing them by number helps you quickly categorize what a question is testing.

Step 2: Read scenarios, not definitions

The RBT exam is scenario-based. You won’t be asked “define shaping.” You’ll be given a scenario and asked which technique is being used. Practice recognizing procedures from descriptions.

Step 3: Take the topic quiz until 90%+ consistent

The Behavior Acquisition topic quiz covers only Unit C content. Take it repeatedly, reviewing every explanation for wrong answers.

Step 4: Apply Unit C on a full-length exam

After you’ve studied the material, the best way to check your readiness is a complete practice exam with two versions — 170 total questions covering all domains under realistic timed conditions. Pay attention to how you perform specifically on Unit C questions.

Step 5: Address weak sub-topics one at a time

If chaining consistently gives you trouble, spend a study session just on chaining. If prompt fading strategies blur together, drill just those.

Five Common Exam Traps in Unit C

Trap 1: The RBT “modifies” the plan

Any answer where the RBT independently changes the intervention is almost always incorrect. The right answer is typically “document and refer to the BCBA.”

Trap 2: DTT vs NET based on the setting described

Structured trials with clear SDs and ITIs = DTT (C.3). Instruction embedded in play, meals, or daily routines = NET (C.4).

Trap 3: Confusing the three chaining methods (C.5)

Focus on which specific step the learner completes independently. Last step independent = backward. First step independent = forward. Most steps independent with targeted prompts = total task.

Trap 4: Missing the “immediate” requirement (C.1)

Delayed reinforcement is heavily tested. Any scenario mentioning delays of 5, 8, or 10 seconds should trigger “deliver reinforcement immediately.”

Trap 5: Confusing maintenance with generalization

Maintenance (C.9) is persistence over time. Generalization (C.8) is transfer across settings, people, or stimuli. Often tested together to trip up candidates.

Frequently Asked Questions About RBT Behavior Acquisition

How many Behavior Acquisition questions are on the RBT exam?

The RBT exam includes 19 Behavior Acquisition questions out of 75 scored items — 25% of the exam. Unit C has the highest question count of any domain on the BACB RBT Test Content Outline (3rd Edition).

What is behavior acquisition in ABA?

Behavior acquisition is the systematic teaching of new behaviors that improve a learner’s functional independence, including communication, self-care, social interaction, academic responding, and daily living tasks. It is also commonly called skill acquisition.

How many tasks are in Unit C?

The BACB RBT Test Content Outline (3rd Edition) organizes Unit C into 11 tasks numbered C.1 through C.11, covering reinforcement, conditioned reinforcers, DTT, NET, chaining, discrimination training, prompt fading, generalization, maintenance vs acquisition, shaping, and token economies.

Is Skill Acquisition the same as Behavior Acquisition?

Yes. The BACB Test Content Outline (3rd Edition) officially uses Behavior Acquisition. Many study materials use Skill Acquisition. Both terms refer to the same 11 tasks in Unit C of the RBT exam.

What’s the difference between DTT and NET?

DTT (task C.3) uses structured, repeatable trials with clear SDs, responses, consequences, and inter-trial intervals. NET (task C.4) embeds instruction into the learner’s play and daily routines using natural reinforcers. DTT suits foundational discrete skills; NET suits communication and generalization.

What is the difference between forward and backward chaining?

Forward chaining teaches the first step of a chain first, then adds subsequent steps. Backward chaining teaches the last step first with all earlier steps prompted, so the learner experiences task completion on every trial. Both are covered under task C.5.

What are the four prompt fading procedures per BACB?

The BACB Test Content Outline (3rd Edition) specifically lists errorless learning, least-to-most prompting, stimulus fading, and time delay as prompt fading procedures under task C.7.

What is stimulus control transfer?

Stimulus control transfer means moving control of a response from a prompt to the natural discriminative stimulus. It’s the goal of every prompt-fading procedure. When the learner responds correctly with no prompt, stimulus control has transferred.

What is shaping in ABA?

Shaping (task C.10) reinforces successive approximations toward a target behavior. Each approximation must be closer to the goal than the previous one. Shaping refines a single response over time, unlike chaining (C.5) which builds a multi-step sequence.

What is the difference between conditioned and unconditioned reinforcers?

Unconditioned reinforcers (food, water, warmth) have reinforcing value biologically without prior learning. Conditioned reinforcers (praise, tokens, checkmarks) gain value through repeated pairing with existing reinforcers. Task C.2 covers establishing and using conditioned reinforcers.

What is the difference between generalization and maintenance?

Generalization (task C.8) is transfer of a response to new stimuli, settings, or people. Maintenance (task C.9) is persistence of a skill over time. Task C.9 specifically requires distinguishing between maintenance and acquisition procedures.

Can an RBT modify a behavior acquisition plan?

No. RBTs implement plans exactly as written by the supervising BCBA. Observations are documented and reported to the BCBA, who decides whether to modify the plan.

What is a token economy?

A token economy (task C.11) is a reinforcement system where the learner earns tokens as conditioned reinforcers, which they later exchange for backup reinforcers at scheduled exchange times.

What is the ITI in DTT?

ITI stands for Inter-Trial Interval — a brief pause (typically 3-5 seconds) between consecutive discrete trials. The ITI preserves the discriminative properties of the SD. Skipping the ITI is a common procedural error tested on the exam.

How many hours should I study Unit C for the RBT exam?

Most candidates spend 10 to 15 hours on Unit C — more than any other domain. Because Behavior Acquisition is 25% of the exam, thorough preparation here delivers the highest return on study time.

Practice Behavior Acquisition Content

The fastest way to lock in Unit C content is active practice with scenario-based questions and detailed explanations.

Other RBT Study Guide Units

• Unit A: Data Collection and Graphing (13 questions, 17%)
• Unit B: Behavior Assessment (8 questions, 11%)
• Unit D: Behavior Reduction (14 questions, 19%)
• Unit E: Documentation and Reporting (10 questions, 13%)
• Unit F: Ethics (11 questions, 15%)
• Return to the full RBT Study Guide

About the BCBA Reviewer

All content in this Behavior Acquisition study guide is reviewed by James Fuller, BCBA, a Board Certified Behavior Analyst with clinical experience supervising RBTs across Applied Behavior Analysis service settings. James reviews study guide content for clinical accuracy, alignment with the current BACB RBT Test Content Outline (3rd Edition), and consistency with current examination policies.

James Fuller’s certification can be verified through the official BACB Certificant Registry. Content on this page was most recently reviewed on July 15, 2026.

This site is independently created and operates without affiliation to the Behavior Analyst Certification Board (BACB) or Pearson VUE. For official RBT examination policies, please refer to the BACB website. The official RBT Test Content Outline (3rd Edition) is the authoritative source for exam content.

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