Pairwise comparison
Contrast	Difference a	Test (df b )	p
Audiogram – Questionnaire	−0.06	t = −0.342 (144)	.997
Audiogram – Random	0.02	t = 0.124 (144)	1.000
Audiogram – Self test	0.19	t = 1.005 (144)	.853
Audiogram – Try	0.07	t = 0.378 (144)	.996
Self test – Try	−0.12	t = −0.626 (144)	.971
Self test – Questionnaire	0.25	t = 1.347 (144)	.663
Self test – Random	0.16	t = 0.88 (144)	.904
Try – Questionnaire	0.13	t = 0.72 (144)	.952
Try – Random	0.05	t = 0.254 (144)	.999
Questionnaire – Random	0.09	t = 0.466 (144)	.990

^a Better-ear PTA fixed at 33.

^b Satterthwaite degrees of freedom.