Prompt Hierarchy in ABA: The 6 Levels & Where Teams Go Wrong
Give a learner too much help, and they never have the chance to learn and generalize the skill. Give too little, and a task stalls. In Applied Behavior Analysis (ABA), a prompt hierarchy exists to manage that balance. It lays out how much support to provide during a teaching trial, including when and how to gradually pull back.
This structure is one of the most useful tools a Board Certified Behavior Analyst (BCBA) can build into a treatment plan. It keeps every Registered Behavior Technician (RBT) working the same way and turns subjective decisions about support into something the whole team can plan for and track.
What is a prompt hierarchy in ABA?
A prompt hierarchy in ABA is a ranked list of prompt types, arranged from most to least intrusive, that tells you which level of support to offer during a teaching trial.
Instead of guessing how much help to give, you follow a plan: start at a set level, then move up or down based on how the learner responds.
Most hierarchies use the same core levels of prompts: full physical, partial physical, modeling, gestural, verbal, and visual, with independent responding as the end goal.
The hierarchy itself is just that list. How you move through it, whether you start at the top and fade down or start at the bottom and build up, is a separate decision that depends on the learner and the skill being taught.
That decision belongs to prompt fading strategies, such as most-to-least and least-to-most prompting.
What are the levels of a prompt hierarchy?
A typical ABA prompt hierarchy has six levels, moving from the most support to the least.
- Full physical: Guiding a learner's hand through the whole response, such as helping them pour water into a cup.
- Partial physical: A light touch that starts the movement without finishing it, such as a touch on the wrist to prompt a learner to pick up a spoon.
- Modeling: Showing the response so the learner can copy it, such as stacking a ring onto a peg before asking the learner to try.
- Gestural: A nonverbal cue, such as pointing to a shoe to prompt a learner to put it on.
- Verbal: A spoken cue, ranging from a direct instruction ("Put the ring on the peg") to an indirect hint ("What goes here?").
- Visual or positional: A picture, written cue, or placement of materials, such as a cup placed within reach to prompt a learner to ask for a drink.
Independent responding sits at the end of the hierarchy, and it’s the goal: the learner completes the skill with no prompt at all.
Not every skill needs all six levels of prompting. A simple response might only call for two or three prompt types, while a multi-step task, like getting dressed or setting the table, often needs the full range of prompts spread across different steps.
How do BCBAs use a prompt hierarchy in sessions?
BCBAs use a prompt hierarchy to decide which prompt level to deliver in a trial, and when a learner needs less support.
Before writing a version of the hierarchy into a treatment plan, most BCBAs start with a baseline skills assessment of the learner's current abilities. This shows where on the hierarchy to begin.
The hierarchy then guides both new skill acquisition and error correction. During skill acquisition, BCBAs select a starting prompt level and fade it over time. During error correction, BCBAs decide how much extra support to add after an incorrect response.
This type of guided process can help teams make more consistent choices. But the prompting approach shouldn't look the same for every learner or every goal. The hierarchy that works for a learner's communication goals might be nothing like the one for their hygiene routine.
Does the order of prompts make a difference?
Yes: starting at the top of the hierarchy versus the bottom leads to different trade-offs in errors and speed.
One study compared most-to-least and least-to-most prompting in children with autism. It found that most-to-least prompting produced fewer errors overall, though some learners acquired the skill faster with least-to-most prompting.
Meanwhile, another study looked at prompting procedures during discrete trial training: short, structured practice rounds of a single skill.
The researchers found that several approaches, including most-to-least prompting and a responsive prompt delay procedure, worked similarly well, though the time each learner needed to reach mastery varied by procedure.
A hierarchy gives you a consistent set of options to choose from, but only your own session data can show which is working for a given learner.
Common mistakes when building a prompt hierarchy
Certain habits can undermine a prompt hierarchy, even when the plan behind it is sound.
Staying at one prompt level too long
If a learner responds correctly to a gestural prompt for weeks and nobody fades it, that gesture can become the reason the learner responds, a pattern known as prompt dependency.
A learner who becomes dependent on a prompt won’t be able to transfer the skill to environments where the prompt is missing.
Skipping the baseline
Building a hierarchy without first assessing what the learner can already do risks starting at a prompt level that's too high or too low.
This mistake can become apparent quickly: the learner either sails through every trial or gets stuck on the same step for weeks. Both are signs to return to the baseline assessment rather than push forward on a guess.
Not tracking which prompt level worked
If a team only records whether a response was correct, not which prompt produced it, there's no data to indicate when to fade the prompt and encourage the learner’s independence.
Inconsistency across the team
If one RBT delivers a gestural prompt and another delivers a verbal prompt for the same target, it can make the learner’s progress inconsistent and result in mismatched data.
This issue reflects low procedural integrity on the team, and clarifying and retraining on the hierarchy and the rest of the treatment plan helps address it.
Manage prompt hierarchies effectively with Passage Health
A prompt hierarchy only holds together if every RBT uses it the same way on every trial. That consistency is hard to guarantee (and harder to track) when data is logged, charted, and reviewed in multiple tools.
Our Passage Health mobile app lets you record session data in real time. This data syncs automatically to our platform, where it flows into every stage of an ABA practice.
With our all-in-one platform, you also get access to:
- Programmable session timers: These can start automatically once a session begins, so rate, interval, and duration targets track consistently across sessions.
- Automated graphing: Prompt levels become visual trends, so a stalled fade or rising prompt dependency is easy to spot.
- AI-assisted documentation: Our integration with Frontera AI means session notes become first drafts of documents for BCBAs to review and edit.
- Simplified billing: Customizable treatment reports and electronic claims generate straight from your prompt-level data, so there’s no separate billing system or duplicated data entry.
- Authorization tracking: Get notified before payor authorizations are about to lapse, so these deadlines never catch your team off guard.
- Scheduling on the go: Set up sessions and reassign staff from our app. See your calendar in color-coded, filterable views.
- Practice-wide reporting: Track utilization and performance across your whole practice.
- Organized leads: Our new Client Intake feature helps you manage prospective clients from their first contact.
It's all wrapped together in a simple interface backed by 1:1 onboarding and a responsive support team. We also add new features to the platform every quarter, based on our clinics’ suggestions.
Book a demo to see how Passage Health cuts down on admin, so your team can spend more time focusing on learners.
Frequently asked questions
What does a prompt hierarchy mean in ABA?
A prompt hierarchy refers to the set order for how much help to give during an ABA trial. It ranges from heavy hands-on support to none at all, once the learner can do the skill alone.
What are the six levels of a prompt hierarchy?
The six levels of a prompt hierarchy are full physical, partial physical, modeling, gestural, verbal, and visual prompts. Not every skill needs all six; simpler tasks may only call for two or three levels of prompting.
What's the difference between a prompt hierarchy and prompt fading?
The difference between a prompt hierarchy and prompt fading is that a hierarchy lists which prompt types exist, while prompt fading is the strategy for moving through that list. Most-to-least and least-to-most are two fading strategies you could use with the same hierarchy.
How do you decide where to start on the hierarchy?
A baseline skills assessment shows where to start on the hierarchy. It measures what a learner can already do without help, which points to the prompt level most likely to produce a correct response.
References
Cengher, M., Budd, A., Farrell, N., et al. (2018). A review of prompt-fading procedures: Implications for effective and efficient skill acquisition. Journal of Developmental and Physical Disabilities, 30, 155–173. https://doi.org/10.1007/s10882-017-9575-8
Cowan, L. S., Lerman, D. C., Berdeaux, K. L., et al. (2023). A decision-making tool for evaluating and selecting prompting strategies. Behavior Analysis in Practice, 16, 459–474. https://doi.org/10.1007/s40617-022-00722-8
Foran-Conn, D., Hoerger, M., Kelly, E., et al. (2021). A comparison of most to least prompting, no-no prompting and responsive prompt delay procedures. Behavioral Interventions, 36(4), 1024–1041. https://doi.org/10.1002/bin.1808
Han, J. B., Bergmann, S., Brand, D., et al. (2023). Trends in reporting procedural integrity: A comparison. Behavior Analysis in Practice, 16(2), 388–398. https://doi.org/10.1007/s40617-022-00741-5
Libby, M. E., Weiss, J. S., Bancroft, S., et al. (2008). A comparison of most-to-least and least-to-most prompting on the acquisition of solitary play skills. Behavior Analysis in Practice, 1(1), 37–43. https://doi.org/10.1007/BF03391719
Weyman, J. R., Imler, M., & Kelly, D. A. (2024). Addressing prompt dependency in the treatment of challenging behavior maintained by access to tangible items. Behavioral Sciences, 14(9), Article 828. https://doi.org/10.3390/bs14090828
