> What are the differences in therapeutic strategy of a theory based on operant conditioning and one based on classical conditioning? That's a good question. I honestly cannot answer this question. I do know that the Lidcombe programme uses Operant conditioning (punishing and rewarding), and (correct me if I'm wrong) I think they report a very high stuttering recovery rate in young children. In this PDF document the Lidcombe explains a few techniques regarding operant conditioning: [https://ahn.mnsu.edu/globalassets/college-of-allied-health-and-nursing/speech-hearing-and-rehabilitation-services/stuttering/serious-information/the-bookstore/lidcombe2.pdf](https://ahn.mnsu.edu/globalassets/college-of-allied-health-and-nursing/speech-hearing-and-rehabilitation-services/stuttering/serious-information/the-bookstore/lidcombe2.pdf)