In this experiment every trial will be more or less the same: You will see 2 rings of colorful dots. One of the rings will be changing color continuously. Your task is to choose which ring changes color.

Please note that in some trials, both rings will be rotating, while in other trials, they will both be stationary. This is not important as far as your task is concerned. You just need to choose which ring changes color.

When doing the experiment, please keep your fingers on the numbers 1 and 2 keys. The rings on the screen will be in four boxes, two on top and two on the bottom. 1 refers to the left box, 2 refers to the right one. The boxes will be labeled with numbers to remind you. Your job: press the appropriate 1 or 2 key on the keyboard as fast as you can to indicate which box has the ring that is changing colors. If possible, please maintain a viewing distance of approximately 57 cm (around 22.4 inches). That's about the distance of a fully outstretched arm touching the screen from where you are seated.

After you have made your choice, you will be invited to move on to the next trial. Before each trial begins please fixate the square in the center of the screen.

Click 'start training' when you are ready to see the training trials.

Training is now complete. The experiment is about to start. The experiemnt will take around 15 mintues.

Click 'start experiment' when you are ready. Remember, your job is to press 1 or 2 on the keyboard as fast as possible to indicate which box contains a ring that is changing color.

Click 'next' to continue.

The experiment is finished. Please clikc 'submit' to submit your data. Thank you.