DTT vs NET: The Two Core RBT Teaching Formats
Discrete trial training (DTT) is structured, repeated teaching delivered in a fixed sequence, a clear instruction, a response, immediate feedback, with a defined start and end to each trial. Natural environment teaching (NET) embeds the same kind of teaching inside normal activities and routines instead of a structured trial format. Both fall under Behavior Acquisition, the largest domain on the RBT exam at 25% of scored questions, and RBTs are expected to know when and how each is used, not just define them.
Neither format replaces the other; most ABA programs use both, often for the same client at different points in a session or for different skills entirely. Confusing the two, or assuming one is simply “the modern version” of the other, is a common early mistake.
(RBT HQ is not affiliated with the BACB. This page explains standard applied behavior analysis teaching procedures; it does not reproduce any BACB exam question.)
What does a discrete trial actually look like?
A short, repeated sequence: the RBT presents a clear instruction (the discriminative stimulus), the learner responds, the RBT delivers feedback, reinforcement for a correct response or a correction procedure for an incorrect one, and there’s a brief pause before the next trial begins. DTT is deliberately structured and repetitive because that structure makes it easier to teach a specific skill with high precision and to collect clean data on exactly how many trials were correct.
What does natural environment teaching look like instead?
Teaching that happens inside whatever the learner is already doing, play, a snack routine, a trip to get a toy off a shelf, using naturally occurring opportunities to prompt and reinforce a target skill rather than pulling the learner into a structured trial format. NET intentionally sacrifices some of DTT’s repetition and control in exchange for teaching in contexts that look more like real life, which can help a skill transfer more easily to situations outside the teaching session.
| Element | DTT | NET |
|---|---|---|
| Structure | High, repeated fixed sequence | Low, embedded in ongoing activity |
| Setting | Often a table or defined workspace | Wherever the activity naturally happens |
| Data collection | Straightforward, trial-by-trial | Less structured, sometimes harder to standardize |
| Best suited for | Building a new skill with precision | Practicing a skill in a realistic context |
Why would a supervisor choose one over the other for a specific skill?
It depends on where the learner is in acquiring that skill. DTT tends to come first when a skill is brand new and needs the tight repetition and controlled feedback to establish it reliably. NET tends to come in once a skill exists at some level but needs to generalize, to show up reliably outside the structured teaching context. An RBT implements whichever format the plan specifies; choosing between them isn’t the RBT’s call to make independently.
Does using NET mean generalization happens automatically?
No, and this is a common misconception. NET improves the odds that a skill transfers because the teaching context looks more like real-world conditions, but generalization still has to be planned and checked, not assumed. A skill practiced only in NET sessions with one specific person can still fail to show up with a different person or in a different room. See the full generalization and maintenance page for how that’s actually verified rather than assumed.
Can a single session include both DTT and NET?
Yes, commonly. Many sessions move between the two intentionally, structured DTT blocks to build or refine a skill, followed by NET opportunities to practice that same skill inside a more natural activity. An RBT following a written plan implements whatever mix of formats the plan specifies for that session, tracking data appropriately for each format as it happens.
How does prompting fit into both formats?
The same prompting principles apply in either format, just delivered differently. In DTT, prompts are typically planned in advance as part of the trial structure. In NET, prompts often have to be delivered more responsively, in the moment, as a natural opportunity arises. See the full prompting hierarchy breakdown for how prompt levels work regardless of which teaching format is being used.
Run the free RBT HQ practice exam to test scenario-based questions on DTT and NET, since the exam typically presents a situation and asks which format or which next step fits, not a bare definition. The free RBT HQ Exam Prep Cheat Sheet groups Behavior Acquisition terms like these together, useful since this domain carries the most weight on the exam.
FAQ
Is NET a newer, better replacement for DTT? No. Both are established, current teaching formats used for different purposes; NET isn’t a replacement for DTT, and most programs use both depending on the skill and the learner’s stage of acquisition.
Which format is used more often, DTT or NET? Neither is universally “more common”; the mix depends entirely on the specific client’s plan, the skill being taught, and the setting. Both appear across most ABA programs.
Does DTT happen only at a table? Typically in a structured setting, though not necessarily always a table specifically. What defines DTT is the repeated, structured trial sequence, not the physical furniture involved.
Can an RBT decide to switch from DTT to NET mid-session on their own? No. The teaching format is specified in the client’s plan by the supervising BCBA or BCaBA. An RBT follows the plan as written rather than switching formats independently.
Does NET make data collection harder? Often somewhat, yes, since the less structured, embedded nature of NET can make consistent measurement trickier than DTT’s clean trial-by-trial structure. Plans typically specify how data should still be collected during NET.
Bottom line: DTT and NET are two distinct, complementary teaching formats, not competing approaches. DTT builds a new skill with tight structure; NET helps that skill show up in real-world conditions. Most programs use both, following whatever the written plan specifies.