TABLE 1.

Schedule of tracking speed changes during the last 5 min of the task in Experiment 1 (Brief perturbation) and Experiment 2 (Prolonged perturbation).

Brief perturbation		Prolonged perturbation
Time (in seconds)	Sensitivity	Time (in seconds)	Sensitivity
630	2	630–690	2
634	1
690	1.5	691–750	1
694	1
750	2.5	751–810	1.5
754	1
810	1.25	811–870	2.5
814	1
870	1.75	870–930	1.25
874	1

When the tracking speed changes from 1 to a higher number, identical movements of the stick result in faster movements of the cursor on the screen.