Table 1.

Summary statistics for all groups showing 95% CIs (*)

Group	OE	OI	YI
Mean L (dB A) across all digits	54 (50 to 58)*	46 (39 to 53)	44 (42 to 47)
Mean σ (dB A) within digits	2.0 (1.8 to 2.2)	2.7 (2.3 to 3.0)	2.8 (2.6 to 2.9)
Mean σ (dB A) across digits	5.4 (4.1 to 6.8)	6.2 (4.8 to 7.7)	5.5 (5.0 to 6.0)

Mean level (L, dB A) across all digits. Mean deviation (σ, dB A) within digits, that is, the mean of the mean deviation of each individual digit in the range 1–9. Mean deviation (σ, dB A) across digits, that is, the mean deviation across the full range of 1–9. All mean values reported are averaged across all whisperers in each group for all three sessions.

OE, older experienced; OI, older inexperienced; YI, younger inexperienced.