In Errorless Learning, the teacher must first determine which prompt level to start with when conducting teaching trials. Conducting probes allows us to determine what level of help is necessary for the learner to be correct. Frequent probe trials allow us to gradually fade out our prompts and let the learner make the correct response independently.
In this lesson, the term “probe” is used to determine the required prompt level. This is not to be confused with conducting baseline sessions or probing unknown teaching targets.