![parents & teachers](../web_assets/pretty/newpretty_educators.jpg)
Baseball
![Reed plays ball](../web_assets/adults/tguide_baseball_photo1.jpg)
How would you investigate this question?
Controlling variables in a human performance investigations is tricky. There are a lot of other variables to pay attention to, as well. Select the one or two variables you are most interested in, find ways to vary them, and try to keep everything else constant. Describe your investigation in your notebook and discuss it with your teacher, or go to Baseball to learn what Reed and Nick discovered.