The Moving Thumb
Philosophers spend a lot of time pointing out that we don’t really see the world and that what we really see is what our brains make of the world. Too much of this kind of thing can make you want change your major to Business Administration.
Not ‘Windows To The World’
But science has shown that those philosophy types actually have a point. Here’s a simple demonstration you can do to show that your brain doesn’t just take in information, but always interprets that information.
Hold your arm out and stick your thumb up in the air. While looking at your thumb, slowly move your hand back and forth. Next, hold your hand still and slowly move your eyes back and forth.
Why did your thumb seem to be moving in the first instance and not in the second? The same image was sent to your retina, but in one instance you felt your hand was moving and in another you felt your hand was still. This shows that our brains aren’t just open windows through which the world pours. They are always interpreting the information they receive.
Philosophers spend a lot of time pointing out that we don’t really see the world and that what we really see is what our brains make of the world. Too much of this kind of thing can make you want change your major to Business Administration.
Not ‘Windows To The World’
But science has shown that those philosophy types actually have a point. Here’s a simple demonstration you can do to show that your brain doesn’t just take in information, but always interprets that information.
Hold your arm out and stick your thumb up in the air. While looking at your thumb, slowly move your hand back and forth. Next, hold your hand still and slowly move your eyes back and forth.
Why did your thumb seem to be moving in the first instance and not in the second? The same image was sent to your retina, but in one instance you felt your hand was moving and in another you felt your hand was still. This shows that our brains aren’t just open windows through which the world pours. They are always interpreting the information they receive.