Stimulus prompt
A larger picture provides extra help
In an approved picture-selection program, the learner is asked to touch the cup. The cup picture is twice the size of the other pictures. The RBT gives no gesture or model, and the learner touches the cup. The plan calls for gradually reducing the added size difference when its criterion is met.
Relevant facts
- The target picture has an added size cue.
- No person gives a gesture or model.
The enlarged target is a stimulus prompt. Record the selection as occurring with that added size cue.
Added size cue → correct selection → record the planned stimulus-prompt level
The extra help is in the material. Fade the size difference when the plan’s criterion is met, so the relevant cup features increasingly guide selection.
Prompt and data
A gesture is still help
The learner is asked to place a towel in the basket. The plan allows three seconds, then a point toward the basket if needed. At three seconds the learner has not moved. After the RBT points, the learner puts the towel in the basket.
Relevant facts
- The gesture follows the response window.
- The correct action occurs after the gesture.
Record a response prompted by a gesture.
Instruction → wait → point → correct action
The pointing gesture supplies additional guidance for the action, making it a response prompt. Record the gesture that preceded the completed placement.
Fading
Follow the performance criterion
A plan initially uses a model prompt. It specifies switching to a gesture after two consecutive sessions with at least 4 of 5 correct responses at the model level. The learner scores 4 of 5, then 5 of 5, with no other limiting condition in the plan.
Relevant facts
- Both consecutive sessions meet the stated threshold.
- The next prescribed prompt is a gesture.
Use the gesture at the next planned stage.
4/5 then 5/5 → two qualifying sessions → prescribed fade
The learner has met this plan’s criterion for moving from a model to a gesture. Apply that specified change and continue recording performance at the new prompt level.