Figure 7
From: Rhythmic synchronization tapping to an audio–visual metronome in budgerigars

Accuracy of interresponse intervals.
Differences from the correct IOI in the first and last two IRIs of the last five pecks in the six-hit sequence under the fast- and slow-tempo conditions (mean ± standard errors of mean). The results of the one-sample t-test show significant (P < 0.05) or non-significant differences from zero.