Definition reprinted with permission from Hood, Stephen B. (editor) available from Stuttering Foundation of America: [amazon 093338825X inline]
Revisions occur when the speaker recognizes an error and acts in an attempt to correct it. The error may be in the way a sound is articulated, the way a word is pronounced, the way an utterance is formulated, or when searching for just the right word to express an intended meaning. As such, these are often found in the disfluencies of normally fluent speakers. Stutterers, on the other hand, often use revisions as a form of avoidance hen designed to prevent the occurrence of stuttering. Psycholinguists sometimes refer to this as repair.