Hello,
You will see a sequence of shapes (circles or squares) that are red or blue.
Each shape appears briefly, with random pauses between them.
Press the spacebar only when the current shape matches the
previous shape and color.
Missing a match is an omission error. Pressing space when it is
not a match is a commission error.
For best results, you should be sitting comfortably in a non-swivel chair in a quiet environment, free from
distractions.