To study the effects of sleep on driving, researchers preven…
To study the effects of sleep on driving, researchers prevent some people from sleeping for 24 hours. They find that people who were sleep-deprived hit more plastic cones than those who were not sleep-deprived when they are driving through a curvy obstacle course designed by the researchers. In this example, amount of sleep is the [blank] variable.
Read DetailsTo study the effects of can color on soda sales, researchers…
To study the effects of can color on soda sales, researchers invite people shopping at a big store to purchase a can of soda for a quarter. They find that people are more likely to buy soda in red cans than soda in purple cans. In this example, amount of soda sold is the [blank] variable.
Read DetailsTo study the effects of caffeine on learning, researchers co…
To study the effects of caffeine on learning, researchers compare people’s performance on a test after they study while drinking caffeinated coffee to that of people who drink decaffeinated coffee instead. In this example, people who drink caffeine are in the [blank] group.
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