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Test Your Reflexes!

Test Your Reflexes! | Science Fair Projects | STEM Projects
Are you faster than your friends and family? Test your reflexes and find out! See how quickly you can react to different situations and compare your results.


The hypothesis is that reaction time can vary between different people.

Method & Materials

You will compare reflexes between different people by testing the whole class, comparing boys vs. girls, different ages, and scores after practice. You will also measure eye pupil size change and knee jerk reflex.
You will need a room you can make dim for the eye pupil size change experiment, and nothing for the knee jerk reflex experiment.


The results of the experiments showed that reaction time can vary between different people. The knee jerk reflex was the fastest reflex, taking only 50 milliseconds between the tap and the start of the leg kick.

Why do this project?

This science project is interesting and unique because it allows students to compare their reflexes to their friends and family and see who is the fastest.

Also Consider

Experiment variations to consider include comparing reflexes between different sports, or comparing reflexes between different animals.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!
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