To see if this was influencing test results, Mineault separated the data into two groups: before or after 6pm. The effect was immediately apparent, especially on devices with built-in night modes.

Fewer than 1% people get all answers right on this color perception test. Do you have what it takes to spot the different hues?

Next time something catches your eye, ask yourself why. You might just learn a little more about how your mind works than you expected. optical illusion personality test: what do you see first?