Table 2.

A 2 × 2 contingency table comparing Parkinson's disease (PD) off and on medication for decrement in velocity in experiment 1

	PD On medication
PD Off medication	Decrement	No Decrement	Total
Decrement	56	34	90
No decrement	16	12	28
Total	72	46	118

McNemar's test P = 0.0162.