Fig. 1: Procedure for Both Tasks.

A Procedure for the synchronization task. All participants (n = 62) completed both motor effector conditions (tapping and whispering) and all four stimulus x rate combinations in random order. Each articulator block started with a loudness adjustment where participants were advised to adjust the loudness level until they were no longer able to hear their own whispering or tapping. The following block included priming and synchronization sequences that were completed twice for each condition. B Procedure for the auditory perception task. Participants (n = 57) listened to sequences of syllables and piano tones at fast and slow rates. In 50% of the sequences, the last syllable or piano tone was shifted to be presented earlier and participants were asked to detect these temporal deviations.