Commentary on the network system that connects people all over the world by shaking hands with six people

ByChiarashine

A little boasting tweets are diffused in a few hours and become a place to know of dozens of people and hundreds of people, if left as it is, after ten hours thousands or tens of thousands of people share and praise comments and slander comments There are things that are often delayed ... ... to withdraw the tweet that developed as a result of unfolding after several days later. On YouTube you can see how the "connection" on the network that leads to the people of the whole world by only a few acquaintances is structuredThe sixth gap"The hypothesis is explained.

The Science of Six Degrees of Separation - YouTube


For example, suppose you have 44 friends on your SNS account.


And 44 friends have 44 other friends you do not know.


To a friend of a friend ......


If you have another 44 friends, and you follow one of the 44 friends in the same way ......


Just following 6 steps, you can have a connection with 7.26 billion people.


Currently, since the population on the earth is about 7,175 million people, it is a calculation that only 6 steps will be connected to more people than the population on Earth.


this,"The sixth gapThe first thing that supported the idea of ​​the author isKarinti Frigesh.


Based on "Sixth order gap", you can connect with Tom Cruise and Queen Elizabeth with just 6 steps. A man who stands in the Asian market and talks to the camera stands out from the spot and stands out, yet it is really connected to the next stranger woman only by taking six steps.


In the 1960s, social psychologistsStanley · MilgramIsSmall World ExperimentWe did. In the experiment, the hypothesis was verified that "if you randomly choose two people from among the American citizens, if they are connected, they are on average through six acquaintances."


We made 300 pairs of two at random from people living in the range from Boston to Nebraska where there were 64 pairs and the corresponding 2 people were averaging 5.2 people through acquaintance.


Also of mathematiciansPaul ErdöschIt is also one who tried to elucidate the connection of the network.


However, SNS etc did not exist in the era of Erdosh, there was hardly any information on the network of real people. So he did an experiment with threads and buttons.


When using two threads to randomly combine two buttons, the scale is small but a lot of fragmented connections will be made.


Then, nothing happens up to a certain stage, but pulling one button around when the number of threads exceeds half of the buttons ... ...


Many buttons were pulled up like a crown. From the viewpoint of sociology, this is "network".


Even though each connection is small, the network appears due to an increase in the number of small-scale connections, but the network of Eldesh is reality and not much to visualize. So what is the real world network? It became famous in 1994Kevin · Bacon numberThere is something called.

This is "Kevin BaconKevin · Bacon number 1 ", who has co-starred with Kevin · Bacon number 1 person as" Kevin · Bacon 2 ".... Most of Hollywood actors Kevin · Bacon number will fall from 3 to 4 ". The point where the network appears from a small connection is the same as Erdosch's random network, but in the case of Kevin · Bacon number it was like a flock of "well co-acters".


In other words, in the case of Erdosz, the network was made from two completely random people ... ...


In the case of Kevin · Bacon number, it can be assumed that it was connected only to the two neighbors and the button next to it.


By doing this, the connection between the two randomly chosen buttons will be farther.


However, if we create several "random connections" here, the number of steps of the connection will be short, while the existence of the flock remains.


A real social network has the characteristics of "herd" like Kevin Bacon number, plus a little random connection. At this time, it is important to become important, there is a slightly "random connection".


A sociologist in 1973Mark · GranovreterAnnounced the theory that "the strength of a weak tie band". This means that "highly valuable information of novelty is weaker than people with strong social connections (strong ties such as their families, close friends, workplace colleagues), acquaintance acquaintances, little acquaintance, etc. social connections There is a high possibility that it will come from a tie) "something likeSo, the term "people with weak connection" is "random connection". Random connection is the key to connecting with the world outside of you, making it possible to make a sixth gap.


In fact, when Facebook analyzed its data, 92% of users could connect with 5 steps, not 6 steps.


It is hard to believe in the ground, but it is the "network" that we are currently living to have connections with anyone in the world with just six handshakes.