COLOUR REACTION
WHAT THIS TEST MEASURES
Colour Reaction adds a selective-attention step to a normal reaction task. Instead of responding to any visual change, you must identify the correct colour cue and ignore competing information. That extra decision makes this a different task from Classic Reaction, so the two scores should not be compared as if they measure the same thing.
For a useful personal comparison, keep the same display and input method, complete several rounds, and pay attention to accuracy as well as speed. A very fast response to the wrong colour is still an error.
HOW TO INTERPRET YOUR RESULT
Use the result as a browser-based training score, not a medical measure. Selective attention can vary with fatigue, distraction and practice. Hardware timing also contributes to the recorded result. Read the simple vs choice reaction guide and online test accuracy guide for more context.
GOOD TESTING HABITS
Do not treat the first round as your final score. The first few attempts help you learn the layout and response rule. Once you understand the task, use a short set of repeated rounds and compare both reaction speed and error rate. If your accuracy falls while your times get faster, you may be trading correct decisions for guesses.
Colour displays can also look different between screens. Brightness, contrast, colour calibration and accessibility settings may change how quickly a cue stands out. That does not make the test useless; it means the fairest comparison is against your own previous results on the same setup.
RELATED TESTS
Try Classic Reaction when you want one simple visual cue, then return here to see how adding colour identification changes your performance. Choice Reaction is another useful comparison because it adds a response-selection step without relying on colour alone.