0 30 60 90 120 150 180 0 1000 2000 3000 4000 5000 6000 Rotation rate = 62°/s y = 1376 + 16.2x, R2 = 0.51 Rotation (°) Reaction time (ms) A. Low error rate Rotation rate = 119°/s y = 1490 + 8.4x, R2 = 0.64 Rotation (°) Reaction time (ms) B. High error rate

Rotation results. A. With a low error rate (3 false same and 2 false different in 70 trials), the rotation rate of 62°/s is near the standard literature value. B. With a higher error rate (8 false same and 3 false different in 70 trials), the rotation rate is much higher, 119°/s.