Table 2.

Results from two-way ANOVAs of middle-ear manipulation data.

Stimulus	Test Conditions	Degrees of Freedom (DF)	‘within group’ DF	F statistic	‘uncorrected’ Probability of chance effect
All Seven Frequencies
AC	Oss Rmv vs. control	1	84	404.9	<0.00001
	Freq	6		4.94	0.00020
	Interaction	6		1.20	0.314
AC	Saline vs. control	1	83	135.7	<0.00001
	Freq	6		4.27	0.00085
	Interaction	6		0.37	0.894
BC	Oss Rmv vs. control	1	84	14.08	0.00032
	Freq	6		52.90	<0.00001
	Interaction	6		2.88	0.013
BC	Saline vs. control	1	84	10.00	0.0022
	Freq	6		28.34	<0.00001
	Interaction	6		1.10	0.366
Five Highest Frequencies
BC	Oss Rmv vs. control	1	60	1.46	0.232
	Freq	4		31.56	<0.00001
	Interaction	4		1.05	0.387
BC	Saline vs. control	1	60	3.23	0.077
	Freq	4		19.41	<0.00001
	Interaction	4		0.76	0.559

Tests of differences between the AC and BC thresholds before and after the middle-ear manipulations. Columns describe the stimulus, the test conditions (including an entry for the effect of frequency on each condition and the interaction of condition and frequency), the degrees of freedom (DF) of the different conditions, the ‘within’ group DF, the F statistic and the uncorrected probability that differences between the conditions are due to chance. The tests of the BC data were repeated with only the 5 highest frequencies. Post-hoc Benjamini and Hochberg corrections determine all of the tests with uncorrected p values < 0.02 are significant at the p < 0.05 level with a 5% false positive rate.