Two tasks.One device run.

1. 0
   Warm-up. 2 unscored trials make the motion familiar.
2. I
   Simple reaction. Wait for a green circle to appear, click anywhere as fast as you can. 5 trials. False starts will be retried.
3. II
   Choice reaction. A red or blue circle appears — click the matching button (or keyboard ← for red, → for blue). 5 trials. Misses retry.

Keep the same device, input method, and posture. Touch and mouse runs are not directly comparable.