Table 3.

Inter- and intrarater reliability scores by three skilled raters for perceptual ratings of voice quality, hypernasality, and speech impairment during (a) a sustained vowel and (b) continuous speech.

	Interrater reliability	Intrarater reliability
Feature	ICC(2,k)	ICC(3,k), M (range)
Sustained /a/
Roughness	.81	.93 (0.91–0.95)
Breathiness	.86	.84 (0.76–0.90)
Strain	.65	.85 (0.78–0.96)
Overall dysphonia	.89	.93 (0.89–0.96)
Hypernasality	.81	.94 (0.88–0.97)
Continuous speech
Roughness	.80	.85 (0.82–0.90)
Breathiness	.87	.73 (0.50–0.89)
Strain	.89	.93 (0.89–0.98)
Overall dysphonia	.81	.83 (0.67–0.95)
Hypernasality	.91	.93 (0.91–0.94)
Speech impairment	.97	.95 (0.94–0.96)

Note. All values were significant at the level of p < .001. ICC = intraclass correlation coefficient.