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Originalarbeit 155Natke U et al. Langzeiteff ekte der Intensiv-Modifi kation Stottern (IMS). Sprache · Stimme · Geh ö r 2010; 34: 155 -164 Bibliografi e DOI http://dx. Schl ü sselw ö rterThe purpose of the present study was to measure the long-term eff ects of an intensive stuttering modifi cation therapy for adolescents and adults who stutter. The eff ects on fl uency were assessed with 2 quite unknown methods, which seemed to be appropriate to cover 2 important therapy goals: to lessen and ease stuttering as well as the use of stuttering modifi cation techniques. The assessments also included questionnaires regarding self-evaluation and changes in feel ings, attitudes and avoidance behaviour. The speech of 18 clients of 3 consecutive courses of the " IntensivModifi kation Stottern (IMS) " was assessed via telephone calls pre-and post-treatment as well as 1 or, respectively, 2 years after treatment. The telephone calls were surprise calls by an unknown person and were explicitly done outside the context of therapy or refresh ers. The purpose of this approach was to get a realistic view of the fl uency in every day situations of the clients. All measures showed typical results. Post-treatment there are large eff ects, at the follow-up one year later the results fall off , but stabilise in the 2 nd year after treatment. Hence, the goals of the IMS regarding fl uency and the coping of stuttering are achieved on a long-term basis. Measurements of the percentage of discontinous speech time , which refl ects the loss of time by stuttering events, showed an improve ment of 10.8 percentage points after therapy in comparison to the pre-assessment. Time-interval measurement with intervals of 3 seconds showed a reduction of 18.5 percentage points of stuttered intervals. Two years after therapy the amount of intervals which contained stuttering modifi cation techniques was low. Potential reasons and consequences for stuttering therapy are discussed.

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