Pairwise comparison
Contrast	Difference a	Test (df b )	p
Audiogram – Questionnaire	0.03	t = 0.15 (144)	.9999
Audiogram – Random	0.27	t = 1.381 (144)	.6409
Audiogram – Self test	0.60	t = 3.047 (144)	.0227
Audiogram – Try	0.29	t = 1.47 (144)	.5834
Self test – Try	−0.31	t = −1.577 (144)	.5146
Self test – Questionnaire	0.57	t = 2.897 (144)	.0347
Self test – Random	0.33	t = 1.666 (144)	.458
Try – Questionnaire	0.26	t = 1.321 (144)	.6789
Try – Random	0.02	t = 0.089 (144)	1.000
Questionnaire – Random	0.24	t = 1.231 (144)	.7332

^a Better-ear PTA fixed at 33.

^b Satterthwaite degrees of freedom.