Which variable is which?

Question

After consuming alcohol a person tries to hit baseballs with a bat at a batting cage. Graph the relationship between the # of drinks consumed and the persons reaction time.

which variable is dependent and which is independent?

THANK YO USOOO MUCH "J"!
(:

Answer 1

The independent variable is # of drinks. Reaction time is the dependent variable. Think of the difference this way:

which is the cause (independent) and which is the effect (dependent)

Reaction time of sober is the starting point - fastest

Here's some real data
http://www.raaid.net/school/Reaction_Time_Experiment.pdf

Note that for some two drinks improved reaction time - it may have helped the person relax, which loosens the muscles for faster reaction. (Judgment after drinking, however, is a different story)

j