Recent
I saw an article
Saying that it is the closing key of the elevator is actually useless
Design this button
In fact, it is a psychological hint to the passengers
Let yourself think it's going to close soon
Actually it doesn't matter if you press the Close button or not
The time it takes for the elevator to close is the same
This topic
The earliest article came from The New York Times
They interviewed the president of the American Elevator Trade Association
The news that the elevator closing key is useless broke
After that, many media began to report and discuss
The explanation given by experts in the United States is this
To give people with disabilities enough time to enter the elevator
The United States in 1990
Passed a magical disability bill
All elevators must follow the system default
Set the time to close the door
So since it's useless
Why set the close button?
This is for anxious office workers
Get a shred of psychological comfort
I thought that pressing the close button would be a little faster
Fake close key actually
It's a placebo button
（Placebo Buttons）
Although it was a few years ago
But now there are still people spreading such news
So is this also the case with domestic elevators?
For this reason
We specifically asked for advice
Engineer Wang of an elevator company
According to him
The closing key of the elevator is useless
He had never heard of it
As far as he knows, the closing key of the domestic elevator
All are useful
Although this claim was debunked
But this "placebo button"
There are actually quite a few in life
Placebo originated in medicine
Origin of the placebo:
H. United States Dr. K. Beecher was a World War II battlefield anesthesiologist. During the battle to capture the beaches of southern Italy, the analgesics quickly ran out. When the wounded soldier howled for analgesics, the helpless nurse told him that he was now being injected with a powerful analgesic, but that it was actually saline. To Beecher's shock, after injecting the saline, the wounded soldier actually stopped wailing, and the pain stopped. Impressed by this situation, Beecher returned to Harvard after the war and began a series of new experiments to test the efficacy of drugs.
In 1955, he published his famous paper "The Powerful Placebo" in the Journal of the American Medical Association (JAMA), describing that the effects of dozens of conventional drugs actually came from the placebo effect. For the first time, he pointed out that the action of taking medicine itself has a certain therapeutic effect, and only a drug effect stronger than a placebo can be considered an effective drug. Since then, in clinical trials, comparing with the placebo group has become the only rule for the development of new drugs or therapies.
Explanation of the placebo effect
For now
Refers to the psychological effect
It was later used in other areas
The placebo effect is in our lives
Occurs frequently
For example, the progress bar commonly found in various computers
Power on, power off, and transfer files to and from each other
These operations take time for the computer to operate
If there is no progress bar
Users will wait impatiently
With this progress bar
There is a psychological expectation of the time required
Relatively speaking
It is easier to accept this fact
Another example
When opening an official account article
There will be a green progress bar at the top
But
If you set your phone to airplane mode
At this time, the phone is completely offline
It is theoretically impossible to open
But this progress bar will still exist
It took a few seconds before you were told that it could not be opened
placebo
A good idea in itself
It can make people no longer anxious
But sometimes it is taken to fool people
Instead, it increases the troubles of life
Like what "packed boy", "exam packed"
If you think about it, isn't it the same thing?