Question

Maria believes that high doses of caffeine speed up a person's reaction time. In order to test her hunch, she has five friends each drink three 8-ounce cups of coffee and then measures how quickly they are able to push a button when a tone is sounded. What is wrong with Maria's research strategy?

Answer 1

Answer:

Maria is missing a control group.

Explanation:

For Maria's experiment to be accurate, she needs to have a group of people that have not drank coffee. She will then be able to compare the experimental group to the control group for more accurate results.