Freidl W, Egger J, Friedrich G
Psychother Psychosom Med Psychol. 1989 Aug;39(8):300-5.
The study was done to prove the etiopathogenetical power of some personality traits, proceeding life events, and strain effects when exposed to an experimental work-stress. 20 functional dysphonics, 14 individuals suffering from organic voice disorders and a group of 20 control persons were examined. The results show that the group of functional dysphonics produced a significant more positive self-evaluation regarding their personality with a clear tendency to restraint. Compared to the control group they showed a higher level of state anxiety in situations causing stress. Furthermore the influence of proceeding life events for the etiopathogenesis of functional dysphonia has become clear.