Verbal Behavior: Extended Edition. Chapter 10: Supplementary Stimulation. Quote 8

The plain mishearing of a verbal stimulus is common. But if the echoic stimulus is weak, it does not follow that the response is otherwise undetermined. Other variables are simply more likely to be effective as supplementary sources of strength. When such variables are apparent, we say that the mishearing is “revealing” in the Freudian sense. (p. 259)