Music and Metronomes Differentially Impact Motor Timing in People with and without Parkinson’s Disease: Effects of Slow, Medium, and Fast Tempi on Entrainment and Synchronization Performances in Finger Tapping, Toe Tapping, and Stepping on the Spot Tasks

Table 3

Mean interonset interval of the stimuli and interresponse intervals by group for each tempo.

Tempo	Beats per minute	IOI	IRI younger mean^a (SD)	IRI older mean^a (SD)	IRI Parkinson’s mean^a (SD)
Slow	81.02	741.87	740.35 (31.77)	735.86 (36.14)	735.15 (52.89)
Medium	116.25	516.71	515.56 (17.10)	516.63 (19.46)	514.10 (19.33)
Fast	139.68	429.95	430.12 (10.79)	430.21 (9.89)	428.35 (14.98)

IOI, interonset interval; IRI, interresponse interval; SD, standard deviation; ^amilliseconds.