How to trick your own brain? Since our mind is not a mirror of what is happening around. Much of what we see in the outside world comes from within and is a byproduct of how the brain processes sensations. Scientists have found many ways that reveal the deceitfulness of our senses, and here are some of them.
1. Ganzfeld's procedure
The Ganzfeld Procedure is a gentle sensory isolation technique that was first proposed in experimental psychology in the 1930s. For this experiment, you need to tune the radio for interference, lie on the sofa and use an adhesive plaster to attach half of table tennis balls to your eyes. Within a minute, the person begins to experience hallucinations. Some people see horses running in the clouds, others hear the voice of a deceased relative.
The thing is that our mind is dependent on sensations and when there are very few of them, our brain begins to invent its own.
2. Reduction of pain
If you suddenly get slightly hurt, look at the damaged part with upside-down binoculars - the pain should decrease.
Scientists from the University of Oxford have experimentally demonstrated that looking at a wounded arm through the far end of binoculars visually reduces the size of the arm, as well as pain and swelling. This suggests that even basic sensations such as pain depend on our vision.
3. Pinocchio's Illusion
This experience requires two chairs and a blindfold. A person with a bandage sits in the back seat, looking at the person in front. Then the person who is blindfolded reaches out and places it on the nose of the person in front.
At the same time, he touches his own nose with the other hand and starts stroking both noses lightly. After about a minute, over 50% of people report that their nose is lengthening.
4. Deception of thinking
Raise your right leg a few centimeters off the floor and start moving it clockwise. While you are doing this, use your right index finger to draw a number 6 in the air. Your foot will begin to rotate counterclockwise, and there is nothing you can do about it.
The left half of the brain, which controls the right side of the body, is responsible for rhythm and synchronization. She cannot cope with the work of two opposite movements at the same time and combines them into one movement.
5. Deception of hearing
This trick can be done with three people, one of whom will be the test subject and the other two will be the observers. You will also need headphones attached to two plastic tubes on both sides. Ask the subject to sit on a chair at an equal distance between two observers. Each observer in turn speaks into the receiver from the corresponding side. The listener in this case correctly determines the direction of the sound. If you switch pipes and start talking, the listener will get confused and will point in the opposite direction from the sound.
Auditory localization is a person's ability to determine direction to a sound source. The human auditory system is endowed with a limited ability to determine the distance of the sound source, and is based on the intersonic time difference. When you change the tubes, the perception of neurons on the opposite side of the brain is activated, and the person cannot determine the source of the sound.
6. Rubber Hand Illusion
More than ten years ago, psychologists discovered an illusion that allows you to convince a person that the rubber hand is his own. This experiment requires a rubber hand or an inflated rubber glove, a piece of cardboard, and two paintbrushes. Place your rubber hand on the table in front of you and hide your hand behind the cardboard. Ask someone to stroke a real hand and a rubber hand at the same time, using the same brush strokes.
After a few minutes, you will feel like the artificial hand has become your flesh. If you ask another person to hit a rubber hand, the person will feel anxiety and pain, as the brain is convinced that the rubber hand is real.
7. The sound heard by those under 20
The sound, a sinusoid with a frequency of 18, 000 Hertz, is audible to those who are not yet 20 years old. It is used by some teenagers as a mobile phone ringtone to prevent other people from hearing if the phone is ringing. You can listen here.
As a person gets older, he loses the ability to hear sounds of higher tones, and therefore only young people under the age of 20 are able to pick it up.
8. Purkinje Effect
Ian Purkinje, the founder of modern neuroscience, discovered an interesting hallucination as a child. He closed his eyes, turned his head towards the sun and began to quickly move his hand back and forth in front of his closed eyes.
After a few minutes, Purkinje noticed multicolored figures that were becoming more intricate.