Relationship between covert and overt speech measures immediately before and immediately after stuttering treatment.

Overt and covert assessments of monologue and conversational speech were compared in 22 male adult stutterers immediately prior to the commencement of intensive treatment, and in 15 male adult stutterers immediately after completion of intensive treatment. There were no overall differences between covert and overt speech measures taken immediately before treatment. Immediately after intensive treatment, stuttering frequency (%SS) was significantly higher in covert evaluation than in overt evaluation, though the magnitude of the difference was small. There were no consistent covert-overt differences in speech rate (SPM). These results suggest that overt speech samples constitute a valid source of information about stutterers' 'real life' speech immediately before treatment but are less valid immediately after treatment.