Variables

Controlled Variables:

1)   We played each video game for the same length of time.

2)   We made sure we did not test after any sports or physical activity.

3)   We used the same blood pressure and heart rate monitor.

4)   We used the same gaming environment.

5)   We used the same people for the testing.

Independent Variables:

1)   The types of games we played to get our results.

2)   The people we used to test each game. (us)

Dependent Variables:

1)   Blood pressure.

2)   Heart rate.