Specific " active ingredients " for therapeutic change were not identified .
PURPOSE A systematic review of behavioural intervention for the treatment of adults with muscle tension voice disorders ( MTVD ) .
The effectiveness of voice therapy for patients with non-organic dysphonia.
Forty-five patients diagnosed as having non-organic dysphonia were assigned in rotation to one of three groups . Patients in one group received no treatment and acted as a control group . Patients in the other two groups received a programme of either ' indirect ' therapy or ' direct with indirect ' therapy , respectively . A self-report question naire of vocal performance , observed ratings of voice quality , and computer-derived acoustic measurements ( signal-to-noise ratio , pitch perturbation and amplitude perturbation ) were carried out on all patients before and after treatment to evaluate the changes in voice quality over time . There was a significant difference between the three groups on the self-report question naire , voice quality ratings and pitch perturbation measurements ( P = < 0.05 ) . Thirteen out of 15 control patients showed no significant change on any of the measures . Seven patients who received indirect treatment showed significant improvement in voice quality following treatment . Fourteen out of 15 patients who received direct treatment showed significant improvement in voice quality
Specific " active ingredients " for therapeutic change were not identified .
PURPOSE A systematic review of behavioural intervention for the treatment of adults with muscle tension voice disorders ( MTVD ) .