Look at the black dot on the screen, and continue looking at it. After a while, a picture containing objects of different color will appear for a brief period (~150ms).
After the picture disappears, you are asked to report the object of particular color (out of multiple choices given to you). If you saw nothing because you were distracted
or missed the picture altogether because you closed your eyes right on time (really!), you can either reload the experiment or choose "none".

The test begins when you press the "start test" button. The black dot stays for just about 5 seconds, so you might have to look at it quickly.
Once again, it is important that you look precisely at the dot or else the experiment won't be valid. Having said that, I must assure you
that it is not a challenge or a trick. So Relax!, we just want to know what you see.

Now please go ahead and press the "Start Test" button below and tell us what you saw. Thanks!
Also, note that the text above is going to remain in place for the first stimulus.