The Lidcombe Program was developed for children younger than 6 years. Children as young as 2 years have participated in clinical trials. One clinical trial showed that the Lidcombe Program can be effective with children in age range 7–12 years.
In the context of the Lidcombe Program, prompting means alerting a child to attempt to be stutter-free in a forthcoming speaking situation. For example, prior to a visit to a friend, the parent might remind the child where they are about to go, and prompt the child to use stutter-free speech. Normally the parent would be careful to follow this up with verbal contingencies.