Skip to main content
Go to homepage

Print Page

Senses Experiment: Which One's Heavier?

How information is sent from the muscles to the brain. Your muscles are pretty good, but they can't detect small differences. This experiment shows "threshold detection" — a fancy name for the point at which your muscles can detect a enough of a weight difference to say to the brain: "Hey, this one is heavier!"

  • A friend
  • A blindfold
  • Two large cups (16 oz. or greater)
  • A marker
  • Enough marbles, beans, or rice to fill both cups

  1. Label one cup "A" and one cup "B."
  2. Fill each cup exactly halfway.
  3. Blindfold your friend.
  4. Have your friend hold one cup in each hand. They should feel of equal weight.
  5. Take the cups back and add a small amount of marbles, beans, or rice to cup A. ("A" for add!)
  6. Return the cups to your friend's hands. Ask which weighs more.
  7. If your friend says one is heavier, ask which one. Is your friend right?
  8. If your friend says they weigh the same, take the cups back again and add a little more to cup A.
  9. Keep taking the cups back and adding to cup A until your friend notices a difference. When he or she does, how much extra weight was needed for the muscles to send that message to the brain?

Your Muscles

Reviewed by: Peace C. Madueme, MD

Lea este articulo en Español

What next?

Summit Mall Play Area
Answer Key:
Click to expand
There are 10 nurses in the picture.

And we have many more pediatric primary care providers in Northeast Ohio. You can meet some of them here.
Summit Mall Play Area
Answer Key:
Click to expand
The five differences are:
– Phone color
– Coat pocket
– Stethoscope earpiece color
– Stethoscope bell dot
– Clipboard paper color

Need help finding a doctor, choosing a location or getting a general question about Akron Children's answered? Call us or fill out the form and we'll help in any way we can.
Summit Mall Play Area
Answer Key:
Click to expand
The two matching doctors are 9 and 14.

With virtual visits, you can see our pediatric experts from the comfort of home or wherever you are.
Summit Mall Play Area
Answer Key:
Click to expand
The correct path:
The Correct Path
We offer many ways to get pediatric care all over Northeast Ohio. Use this page to find the right kind of care and the most convenient location for you.