Glottal Function Index: Adaptation, Validity, and Reliability of the Turkish Version.

Unlabelled: The aim of this study is to adapt the Glottal Function Index (GFI) into Turkish and to evaluate its validity and reliability.

Method: The scale was initially translated into Turkish by two Speech and Language Pathologists (SLP) and one ear, nose, and throat specialist, and then independently translated back into English by two different SLPs. The translations were compared by an expert proficient in both English and Turkish.