Long-term evaluation of psychosocial impact and stuttering severity after intensive stuttering therapy.

Purpose: The purpose of this study was to assess the long-term stability of objective and subjective psychosocial improvements and fluency more than 10 years after participation in an intensive stuttering therapy camp.

Method: Ten former participants in intensive stuttering therapy (IST; mean age at time of intervention 14; 2 years) participated in this study. Outcomes of the IST at that time were assessed with the Stuttering Severity Instrument (SSI-3; Riley, 1994) and a questionnaire to measure the psychosocial impact of stuttering. A semi-structured video call and a general questionnaire for the long-term evaluation were used to gauge the participants' perceptions of the IST. These follow-up data were compared to the therapy outcomes reported by Cook (2011, 2013).

Result: Therapy effects on the severity of stuttering and psychosocial impact were stable over the follow-up period of more than 10 years. Moreover, scores for psychosocial impact and severity of stuttering further decreased from the end of the IST to the long-term evaluation. The intensive time and the periodically offered follow-up treatments were described as particularly positive by the participants.

Conclusion: Intensive stuttering therapy in childhood or adolescence can have a long-term positive effect on both internal and external stuttering symptoms.