Table 3.

Summary data for the bilateral and binaural discrimination tasks, transformed from logarithmic values where appropriate for ease of comparison with previously published data.

Stimulus	Task	Age group	n	Threshold (ms)	95% confidence interval for mean		Range	Range (log)
					Lower	Upper
Tone burst	Bilateral	Younger	37	6.11	4.79	7.78	2.99	0.70
		Older	41	8.55	6.46	11.31	4.84	0.81
Chirp	Bilateral	Younger	37	5.05	4.18	6.10	1.92	0.55
		Older	41	8.11	6.76	9.73	2.97	0.53
Tone burst	Binaural	Younger	37	0.87	0.61	1.26	0.65	1.05
		Older	41	1.70	1.28	2.28	1.00	0.83
Chirp	Binaural	Younger	37	0.31	0.21	0.45	0.24	1.09
		Older	41	0.72	0.50	1.04	0.54	1.06
Reversed chirp	Binaural	Younger	28	0.39	0.24	0.65	0.41	1.45
		Older	37	0.74	0.47	1.16	0.69	1.30
Noise chirp	Binaural	Younger	28	0.37	0.23	0.59	0.35	1.33
		Older	37	0.74	0.49	1.13	0.64	1.21

Range (log) indicates the range of logarithmic values prior to transformation.