Table 1. Correlations in Experiment 1 between trial number and mean measures (across participants).

Variable	M (SD)	r variable, trial number
performance	71% (46)	.75**
latency	716.9 ms (561.5)	−.80**
motion time	1290.8 ms (1010.6)	−.45**
x-flips	3.4 flips (4.2)	−.32**
x-accel. range	5.2 (3.4)	.34**
y-accel. range	5.2 (3.1)	.30**
perturbation	4.7 (2.5)	.61**

^**p<.01