Ms. Debodt et al., TEST-RETEST STUDY OF THE GRBAS SCALE - INFLUENCE OF EXPERIENCE AND PROFESSIONAL BACKGROUND ON PERCEPTUAL RATING OF VOICE QUALITY, Journal of voice, 11(1), 1997, pp. 74-80
Perceptual evaluation was performed by means of the GRBAS scale for a
series of nine pathological voice samples that were presented twice to
a group of 23 judges, consisting of experienced and inexperienced oto
laryngologists (ENTs) and speech-language pathologists (S/LPs). The ti
me interval between ratings was 14 days. Test-retest reliability was m
oderate. The best agreement between the observers was obtained for the
G (grade) parameter and the worst for the S (strained) parameter. Con
sidering the medians of the GRBAS ratings, no significant influence wa
s measured for level of experience or professional background. Yet, ba
sed on means, the results show that professional background has a grea
ter impact on perceptual rating than experience.