RBT · Behavior Acquisition · 6 min read
Prompt Fading and Prompt Dependence
- Define prompt fading, stimulus control, and prompt dependence within the Registered Behavior Technician scope of practice.
- Distinguish between response prompt fading procedures, stimulus fading procedures, and time delay strategies specified in skill acquisition plans.
- Explain the RBT's responsibility to follow written prompting hierarchies, collect accurate prompt-level data, and report signs of prompt dependence to the supervising BCBA or BCaBA.
Understanding Prompts, Stimulus Control, and Fading
A prompt is an antecedent stimulus added to increase the likelihood that a learner emits the correct behavior. Prompts give learners temporary support while they are learning new skills. However, the ultimate goal of prompt fading is independent responding by the learner. Prompt fading is the gradual and systematic removal of assistance to transfer stimulus control to the natural discriminative stimulus.
Stimulus control occurs when a behavior is more likely in the presence of a particular discriminative stimulus than in its absence. For instance, when a technician presents pictures of several items and says 'Point to shoe,' the goal is for the learner to select the shoe in response to the spoken instruction and the pictures, without an added prompt. Following a written prompt-fading procedure can reduce the risk of prompt dependence by helping the learner respond to the natural cue.
Registered Behavior Technicians must implement the specific prompt fading procedure written in the client's skill acquisition plan. RBTs do not design or change these procedures on their own. Instead, they carefully present the natural discriminative stimulus, deliver the planned prompts when required, and collect accurate data on learner performance.
Common mistakes
- Over-prompting by delivering assistance before the planned response interval has elapsed, which prevents the learner from responding independently.
- Independently altering the prompt hierarchy, delay duration, or fading criteria without direction from the supervising BCBA or BCaBA.
- Recording a response that occurred after prompt delivery as an independent response instead of a prompted response during a time delay procedure.
- Writing subjective opinions in session notes regarding why a client is not responding, rather than objectively describing observed prompting, responses, and response latency.
Key points
- Prompts are added antecedent stimuli designed to increase correct responding, and prompt fading systematically removes them to achieve independent responding under natural stimulus control.
- Response prompts act on behavior (verbal, gestural, modeling, physical guidance), whereas stimulus prompts modify physical dimensions of stimuli (color, size, shape, position, visual intensity).
- Least-to-most prompting provides an independent opportunity on every trial before increasing assistance, while most-to-least begins with the highest prompt level to reduce errors during initial acquisition.
- Time delay introduces a pause between the discriminative stimulus and the prompt; it typically begins with a zero-second delay and transitions to constant or progressive intervals.
- Correct responses occurring before a time delay prompt are recorded as independent, while those occurring after are recorded as prompted.
- Prompt dependence occurs when a learner relies on artificial prompts; signs include looking at the RBT's face or hands or waiting for help on previously mastered tasks.
- RBTs must consistently follow written fading protocols, implement specified differential reinforcement, record objective data, and report prompt dependence patterns to their supervisor.
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