Click as fast as you can when the circle turns green. Measures your visual processing speed across 5 trials.
Very Easy
Very long wait times (2.5-5s). Great for getting started.
Easy
Longer wait times (2-4s)
Medium
Standard wait (1-3.5s)
Hard
Short wait (0.5-3s)
Expert
Very short wait (0.3-2s). Requires peak focus.
Scientific Background
Based on: Simple & Choice Reaction Time Paradigms (Lezak et al., 2012)