Short answer
Discrete trial training, or DTT, is a structured ABA teaching method that turns one skill into short practice opportunities. A parent or provider gives a clear instruction, the child responds, and the adult immediately reinforces success or helps the child try again.
- DTT works best for skills with a clear correct response.
- Short sets of 5 to 10 trials are usually easier for parents to sustain at home.
- Skills learned in DTT still need practice in real routines so they carry over.
What is discrete trial training?
Discrete Trial Training (DTT) is a structured ABA teaching method that breaks skills into small, clearly defined units and teaches them through repeated practice. Each discrete trial is a single teaching opportunity with a clear beginning and end.
DTT can be useful when a child is learning a skill with a clear response, such as matching, identifying an object, imitating an action, or choosing between two items. It should still be paired with practice in real routines so the child can use the skill outside the practice setting.
Structure of a trial
Every DTT trial has three parts:
- Instruction or cue: the short direction or question that tells the child what to do. "Touch the ball." "What color is this?" "Show me big."
- Response: the child's answer or action. It can be correct, incorrect, or no response yet.
- Immediate result: what happens right after the response. Correct responses receive reinforcement, such as praise, a preferred item, or a token. Incorrect responses receive a calm correction and another chance.
A brief pause separates one trial from the next. This gives the child a moment to reset before the next instruction.
Discrete trial training examples
DTT is easiest to understand through examples. The adult chooses a target, presents one clear chance to respond, and then gives immediate feedback.
| Goal | Instruction | Reinforcement |
|---|---|---|
| Matching | "Match car." | Praise and quick access to a preferred toy. |
| Receptive language | "Touch spoon." | Praise, token, or another short preferred activity. |
| Imitation | "Do this" while tapping a block. | Immediate praise and a chance to keep playing. |
| Requesting | Show two preferred items and wait for a choice. | Give the chosen item right away. |
If you are choosing what to teach first, see ABA goals for autism or use the free ABA goal tracker.
How to run DTT at home
- Choose your goal and materials. Know exactly what skill you are targeting and have everything ready before you start.
- Get your child's attention. Make sure your child is oriented toward you before presenting the instruction.
- Present the instruction clearly. Use short, consistent wording.
- Wait for a response. Give your child about 3 to 5 seconds to respond before prompting.
- Deliver the result immediately. Reinforce correct responses right away. Calmly help after errors and give another opportunity.
- Pause briefly. A brief "okay" or pause signals the end of one trial before the next begins.
- Run 5 to 10 trials per goal. Then move on to another goal or take a short break before returning.
What skills to teach with DTT
DTT works best for foundational skills with clear correct or incorrect responses:
- Matching objects, pictures, colors, or shapes.
- Identifying named items or following simple directions.
- Naming objects, pictures, or actions.
- Imitating actions, sounds, or words.
- Sorting, categorizing, letters, numbers, and early academic readiness.
Prompting in DTT
When a child does not respond correctly, prompt them to succeed rather than letting them sit with an error. Use the least help that produces the correct response. Common prompts include pointing, modeling the action, or giving a short verbal hint.
Fade prompts as accuracy improves. The goal is always independent responding, meaning the child performs the skill without help.
Common mistakes to avoid
- Repeating the instruction many times. Say it once and wait. Repeating can teach children that they do not need to respond right away.
- Rushing through trials. The pause between trials matters. Do not stack trials so fast that your child cannot process them.
- Using weak reinforcement. Reinforce every correct response during early learning. Missing reinforcers slows learning.
- Keeping the order too predictable. If items always appear in the same sequence, your child may learn the pattern instead of the skill.
- Practicing too long. Stop while the session is still positive. Short practice is usually more sustainable at home.
DTT vs. natural environment teaching
DTT and natural environment teaching are complementary, not competing. DTT builds a skill in a structured practice setting. Natural environment teaching helps the child use that skill during real routines, with real motivation and real materials.
A practical home plan often uses both: a few structured practice trials to teach the skill, followed by natural practice during play, meals, transitions, or daily routines.
Frequently asked questions
What is discrete trial training in ABA?
Discrete trial training is a structured ABA teaching method that breaks a skill into small practice opportunities. Each trial has an instruction, a response, and an immediate result such as reinforcement or correction.
Can parents use discrete trial training at home?
Parents can use simple DTT-style practice for short, clear goals, especially when a professional has shown them what to do. Keep practice brief, positive, and focused on one skill at a time.
What is the difference between DTT and natural environment teaching?
DTT is more structured and usually happens in planned practice trials. Natural environment teaching uses everyday routines and the child's motivation to practice skills in real-life moments.