RBT Skill Acquisition and Training 2 — Questions and Answers

Question 1: In a discrete trial teaching (DTT) format, what is the purpose of the inter-trial interval (ITI)?

To provide reinforcement for correct responses
To allow a brief pause between trials to separate stimuli and prevent carry-over effects (Correct answer)
To record data between trials
To present the next discriminative stimulus

Correct answer: To allow a brief pause between trials to separate stimuli and prevent carry-over effects

The inter-trial interval is a brief pause between discrete trials that separates stimuli and prevents confusion between consecutive responses. It typically lasts 3–5 seconds.

The inter-trial interval (ITI) is the time between the consequence of one trial and the discriminative stimulus of the next trial. Its primary functions are to separate stimuli so the client does not confuse them, reduce the chance that reinforcement from one trial bleeds into the next, and allow the RBT to record data. A typical ITI is approximately 3–5 seconds, though the exact duration may vary by program. During the ITI, the RBT should look away from the client, reset materials, or otherwise signal that the previous trial has ended and the next has not yet begun. Without adequate ITIs, clients may learn to respond based on the previous trial's consequence rather than to the current discriminative stimulus. This can result in error patterns that are difficult to remediate and reduce the overall quality of learning. RBTs should follow the prescribed ITI duration in each program's written instructions and avoid rushing trials together or prolonging ITIs beyond the recommended time, as both can affect learning outcomes.

Question 2: A student consistently needs a physical prompt to complete a hand-washing task. The RBT begins guiding the wrist instead of the full hand. Which prompting strategy is being used?

Stimulus fading
Prompt delay
Graduated guidance (prompt fading within physical prompts) (Correct answer)
Errorless learning with full physical prompt

Correct answer: Graduated guidance (prompt fading within physical prompts)

Graduated guidance involves systematically reducing the intensity of physical prompts (e.g., moving from full hand-over-hand to wrist guidance) to transfer control to the natural discriminative stimulus.

Graduated guidance is a prompting procedure in which the therapist provides exactly the amount of physical assistance needed and systematically reduces that physical contact as the learner demonstrates more independent responding. It is a continuous, moment-to-moment adjustment of physical support rather than a discrete step system. In this example, moving from full hand-over-hand guidance to wrist guidance represents a reduction in the intensity of physical contact. Further fading might involve moving to a touch on the forearm, then the elbow, then shadowing (hovering without touching). Graduated guidance is particularly effective for teaching motor chains and self-care skills because it allows the therapist to prevent errors while also systematically reducing dependence on prompts. The goal is always to achieve independent performance. RBTs should be trained in graduated guidance techniques and follow supervisor direction about which level of physical guidance to use for each step of a task analysis. Documenting the prompt level used for each step is essential for monitoring progress.

Question 3: Which of the following describes a multiple exemplar training approach in skill acquisition?

Teaching one example of a skill until it reaches 100% accuracy before moving on
Teaching a skill across several different stimuli, settings, and people to promote generalization (Correct answer)
Using multiple prompts in sequence within a single trial
Providing multiple reinforcement schedules during one session

Correct answer: Teaching a skill across several different stimuli, settings, and people to promote generalization

Multiple exemplar training involves teaching the same skill using varied examples (stimuli, settings, people) to facilitate generalization beyond the original training context.

Multiple exemplar training (MET) is a teaching strategy that deliberately exposes the learner to varied instances (exemplars) of a target concept or skill. By training across multiple stimuli, settings, instructors, and materials, MET promotes generalization — the ability to apply a learned skill in new, untrained situations. For example, when teaching a child to label 'chair,' teaching only with the classroom chair may result in the child only labeling that specific chair. Teaching with multiple examples (desk chair, kitchen chair, rocking chair, outdoor chair) helps the child develop a broader, more generalizable understanding. MET is especially important for skills that need to be applied flexibly in the natural environment. It is a core strategy for preventing 'stimulus overselectivity,' where learners respond to only one narrow feature of a training stimulus. RBTs implement MET by varying the materials, people, and settings used during instruction as directed by the BCBA's skill acquisition plan. Keeping track of which exemplars have been trained is part of accurate data collection.

Question 4: What is the defining feature of naturalistic teaching procedures compared to structured discrete trial training?

Naturalistic procedures always use more prompts than DTT
Naturalistic procedures embed learning opportunities in the child's natural environment and daily routines (Correct answer)
Naturalistic procedures do not include any reinforcement
Naturalistic procedures are only used for verbal behavior targets

Correct answer: Naturalistic procedures embed learning opportunities in the child's natural environment and daily routines

Naturalistic teaching embeds instruction in everyday activities and the learner's natural environment, using naturally occurring antecedents and consequences rather than structured, table-based trials.

Naturalistic teaching procedures (NTPs), such as incidental teaching, pivotal response training (PRT), and natural environment teaching (NET), embed learning opportunities within the learner's typical daily activities and routines. The child's interests, naturally occurring antecedents, and natural reinforcers guide the teaching interaction. In contrast to structured DTT (which occurs at a table, uses prepared materials, and follows a rigid trial format), NTPs occur wherever the child naturally is — during play, mealtime, transitions, or free time. The instructor follows the child's lead, capitalizing on teachable moments as they arise. NTPs are associated with higher motivation, better generalization to the natural environment, and greater spontaneity of learned skills. They are particularly well-suited for teaching communication, social skills, and play skills in young children with autism. RBTs implementing NTPs must be skilled at identifying and creating teaching opportunities in the moment, using the least intrusive prompts possible, and delivering natural reinforcement contingent on the target response.

Question 5: During a skill acquisition session, a client gives an incorrect response. The RBT immediately provides the correct answer and re-presents the trial. Which error correction procedure is this?

Prompt delay
No-no-prompt error correction (Correct answer)
Transfer trial error correction
Model-lead-test error correction

Correct answer: No-no-prompt error correction

No-no-prompt error correction involves responding to two consecutive errors by then providing a prompted trial. However, in this simplified description, the RBT models the correct response and re-presents — this most closely describes the no-no-prompt or immediate model correction.

Error correction in ABA serves to clarify the correct response after an error occurs. One common procedure is the 'model' error correction approach: when a client makes an error, the RBT immediately models the correct response (e.g., 'The answer is cat'), briefly pauses, then re-presents the original trial to allow a correct response. This approach prevents the learner from practicing errors and immediately provides the information needed to respond correctly. Re-presenting the trial after modeling gives the client the opportunity to respond correctly, which may be followed by lower-magnitude reinforcement or no reinforcement (since it was a prompted correct response). Different programs may use different error correction procedures (e.g., no-no-prompt, least-to-most prompting, transfer trials). The specific procedure should be written in the skill acquisition plan and followed consistently by all RBTs working with the client. Consistency in error correction is critical: if different staff apply different error correction methods, the client's learning may be slowed or inconsistent. RBTs should always follow the prescribed error correction protocol.

Question 6: A BCBA writes a program in which the RBT presents a target item alongside two distractors. As the client achieves mastery, additional distractors are added. What procedure is being described?

Discrimination training with expanding arrays (Correct answer)
Stimulus generalization training
Chaining
Multiple schedule training

Correct answer: Discrimination training with expanding arrays

Discrimination training with expanding arrays involves starting with a small number of stimuli (e.g., one target and two distractors) and gradually increasing the number of distractors as the client demonstrates mastery to build stronger stimulus control.

Discrimination training teaches the learner to respond differently to different stimuli. Using expanding arrays is a way to systematically increase the difficulty of the discrimination as the learner's skills grow. Starting with three items (one target, two distractors) is more manageable than starting with a full array of 10 items. As the client consistently selects the target from a small set, more distractors are added — perhaps moving from 3 to 5 to 8 items. This graduated increase in array size strengthens the stimulus control and reduces prompt dependence. Expanding arrays are commonly used in receptive language programs (e.g., 'touch the _____') and matching-to-sample tasks. The arrangement of items within the array may also be varied to prevent positional responding (where the client always picks items in the same position regardless of identity). RBTs should follow the array specifications in the program and vary the positions of target items to ensure the client is responding to the correct stimulus feature (e.g., the picture that matches the spoken word) rather than to position.

RBT Skill Acquisition and Training 2

In a discrete trial teaching (DTT) format, what is the purpose of the inter-trial interval (ITI)?