Instructions

In this experiment, on every trial, you will be looking for this GREEN CIRCLE:

1. At the beginning of each trial you will see a fixation ‘+’ which you should focus on. When you are ready to begin a trial, press the space bar.
2. You will be presented with a series of red and green shapes. If you see a GREEN CIRCLE in the display press the ‘D’ key, if you do not see a GREEN CIRCLE in the display press the ‘K’. Try to answer as quickly and accurately as possible.
3. You will then begin the next trial.

You will complete 10 practice trials and 80 experimental trials. At the end, your responses on experimental trials will be shown. Press "Next" to begin.