Skill Acquisition — RBT Study Guide

RBT Skill Acquisition: Teaching Procedures, Prompting, and Verbal Behavior

The Skill Acquisition domain is the heart of what RBTs do every day. Whether you are teaching a child to communicate using Picture Exchange Communication System (PECS), helping an adult learn independent living skills, or implementing a Discrete Trial Training (DTT) program designed by a BCBA, the procedures in this domain govern how you structure learning opportunities, deliver prompts, and reinforce progress. With 28% of the exam (~24 questions) drawn from this domain, thorough mastery is non-negotiable.

Discrete Trial Training (DTT)

Discrete Trial Training is a structured teaching format that breaks skills into small, learnable units presented as individual trials. Each trial follows a five-part sequence: (1) the discriminative stimulus (SD) — a clear, consistent instruction from the RBT; (2) an optional prompt if the client needs assistance; (3) the client's response; (4) a consequence — reinforcement for correct responses or a brief error correction for incorrect ones; and (5) an inter-trial interval (ITI) — a brief pause before the next trial to prevent satiation and allow the client to reset. DTT is massed and structured, making it ideal for acquiring new skills that require many learning opportunities.

Natural Environment Teaching (NET)

Natural Environment Teaching uses the client's everyday environment and naturally occurring activities as the context for learning. Rather than sitting at a table for structured trials, the RBT embeds teaching opportunities into play, transitions, meals, and routines. NET produces stronger generalization than DTT alone because the client learns in the context where the skill will actually be used. Best practice in ABA combines both: DTT to acquire the skill, NET to promote generalization and maintenance.

Prompting Strategies and Prompt Fading

Prompts are supplementary stimuli that help the client respond correctly while the target skill is being acquired. The key principle: prompts must be systematically faded to promote independent responding, or the client becomes prompt dependent — a clinical problem where the client only responds when prompted rather than in response to the natural SD.

The most common prompt hierarchy from most to least intrusive is: Full Physical (hand-over-hand guidance) → Partial Physical (light touch guidance) → Model (demonstrating the behavior) → Gestural (pointing or gesturing toward the correct response) → Positional (placing the correct stimulus closer to the client) → Visual (a picture or written cue) → Verbal (a word or partial verbal cue). Most-to-Least (MTL) prompting begins with the highest level of support and fades systematically — this minimizes errors and is used with new or complex skills. Least-to-Most (LTM) prompting begins with the least intrusive prompt and escalates only if the client does not respond — this promotes independence but allows more error responses.

Time delay is a specific fading procedure where a pause is inserted between the SD and the prompt, giving the client an opportunity to respond independently before the prompt is delivered. Constant time delay uses the same delay every trial; progressive time delay increases the delay systematically across trials.

Shaping and Chaining

Shaping uses differential reinforcement to develop a behavior that is not yet in the client's repertoire. Only the closest approximation to the target behavior is reinforced at each step; previous approximations are placed on extinction as higher ones are required. Shaping is used when the terminal behavior cannot be prompted because the client has never performed it.

Chaining teaches multi-step behavior sequences (task analyses) by linking individual behaviors. Forward chaining teaches the first step first and completes the remaining steps for the client. Backward chaining teaches the last step first, so the client always completes the chain with the final step — which provides a clear reinforcer at the end of each trial. Total task chaining has the client attempt every step every trial, with prompts provided as needed.

Verbal Behavior (Skinner's Analysis)

The exam tests the four primary verbal operants from Skinner's analysis of language: a Mand is a request controlled by a motivating operation and reinforced by the specific item or action requested (e.g., "Cookie" → gets a cookie). A Tact is a label controlled by a non-verbal stimulus and reinforced by social praise (e.g., sees a dog → says "Dog"). An Echoic is vocal imitation of a verbal model. An Intraverbal is a response to verbal stimuli without point-to-point correspondence, such as conversational exchanges or fill-in-the-blank responses.

The critical discriminations the exam tests: a mand and a tact can use the same word (both say "ball"), but they are different operants because they are controlled by different antecedents and reinforced by different consequences. Drilling these discriminations with the Skill Acquisition flashcards is the most efficient way to ensure you can answer scenario-based verbal behavior questions correctly on the exam.