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. 2000 Jul 1;20(13):5054–5064. doi: 10.1523/JNEUROSCI.20-13-05054.2000

Fig. 3.

Fig. 3.

Quantification of song stereotypy in young (81–111 d of age) and old (931–2090 d of age) hearing adults.A, Mean of the means of SC and SL measures, based on 20 songs from each bird. Error bars correspond to SEs.B, Stereotypy of chunk durations. SDs were calculated from 15 repetitions of a chunk sung by a given bird; theverticalbars depict the mean of these eight SDs for each age group. Error bars are the SEs among birds in an age group. There was not a statistically significant difference between the groups.