In this task you will see different shapes. Most will be X, others will be O, and others will be different each time. Your job is very simple: When you see an X, press the left button When you see an O, press the right button If you see anything else, press the left button Got it? How about some practice!

In this task you will hear different sounds. Most will be low tones, others will be high tones, and others will be different each time. Your job is very simple: When you hear a low tone, press the left button When you hear a high tone, press the right button If you hear anything else, press the left button Got it? How about some practice!

In this task you will hear different sounds. Your job is very simple: Most sounds will be low tones. Some sounds will be high tones. Other sounds will be different each time. We simply want you to keep count of the number of high tones you hear. We will ask you for your count at the end of the experiment. Got it? How about some practice!

In this task you will see different shapes. Most will be X, others will be O. Your job is very simple: When you see an X, press the space bar When you see an O: don’t press anything! Got it? How about some practice!

In this task you will see different shapes. Most will be X, others will be O. Your job is very simple: When you see an X, you don’t need to do anything. When you see an O, press the space bar Got it? How about some practice!