Social network

People are linked in many ways.

We have friends and groups. These links make a big web.

Some people study these webs. They look at how we connect. They want to see how ideas move.

Long ago, a man named Jacob Moreno studied groups. He used maps to show how people felt.

Now, we study webs on computers too. We can see how people talk online.

Learning about these links is very useful. It helps us understand our world.

A social network is a web of links between people. These links can be between two people or large groups.

Scientists study these webs to see how people connect. They want to find influential people in a group. They also study how false news spreads on social media.

Many thinkers helped start this study. In the 1930s, Jacob Moreno made maps of social ties.

These maps are called sociograms. They show how people in a group interact. In the 1970s, Stanley Milgram studied how people are linked. He spoke about "six degrees of separation." This idea means most people are close through a few links.

Researchers look at networks on different levels. The micro-level looks at small groups. A dyad is a link between two people. A triad is a group of three people.

Large networks can even show patterns that form on their own. This is called self-organization. Today, we use computers to study these big digital webs.

A social network is a special way to look at how people connect. It is not just about one person or one group. Instead, it focuses on the ties and interactions between them. These ties can link individuals, large organizations, or even whole societies.

Scientists use this view to study how things like misinformation spread on social media. They also use it to find which people are most influential in a group. By looking at these patterns, researchers can understand how entire systems work together.

Researchers study these networks at different levels to see different patterns. The micro-level is the smallest way to look at a network. It often starts with one person, called an actor or an ego.

Scientists might look at a dyad, which is a relationship between just two people. If you add one more person, you create a triad. A triad is a group of three people that can show how friendships balance out. They can also look at subsets, like small, close groups called cliques.

Many thinkers helped build this field over many years. In the late 1890s, Émile Durkheim and Ferdinand Tönnies shared early ideas. Tönnies spoke about community ties and formal social links.

Georg Simmel also wrote about how the size of a network changes how people act. In the 1930s, Jacob Moreno created sociograms to map out relationships. Anthropologists like Bronislaw Malinowski and Claude Lévi-Strauss also studied social structures. These different ideas eventually came together to form a new way of science.

By the 1970s, more scholars were combining these different paths of study. Harrison White and his students at Harvard University were very important here.

Another famous thinker was Stanley Milgram, who studied the idea of "six degrees of separation." This idea suggests that most people are linked by just a few steps. In the late 1990s, new researchers like Duncan J. Watts and Albert-László Barabási began using computers. They used new data to study how online social networks work in the digital age.

Social network analysis is now a major part of many sciences. It is used in sociology, biology, and even economics.

It helps us understand how complex patterns emerge from simple interactions. These patterns are called self-organization. Even though networks can be huge, researchers choose the right scale for their questions. This helps them see the big picture without getting lost in too much detail. Studying these webs helps us see the invisible threads that hold our world together.

A social network is a theoretical construct used to study relationships. It focuses on social actors, such as individuals or organizations. These actors are linked by networks of dyadic ties. A dyadic tie is a relationship between two people. These ties represent the convergence of various social contacts. This approach is inherently relational in its nature. Instead of studying the properties of a single unit, researchers study the relations between units. This helps scientists understand the structure of whole social entities. It also allows them to explain the patterns observed within these structures.

Social network analysis involves identifying both local and global patterns. It can locate influential entities within a specific system. Researchers use these methods to examine the dynamics of different networks. For example, they study how misinformation spreads on social media platforms. They also analyze the influence of key figures in various networks. This field is highly interdisciplinary. It emerged from social psychology, sociology, statistics, and graph theory. It has now grown into a major part of network science. This field examines complex networks to see how they function as a whole.

Researchers analyze networks at three general levels. These levels are the micro-level, the meso-level, and the macro-level. The micro-level is the smallest scale of analysis. It often begins with a single individual, known as an actor or an ego. Within this level, scientists study dyads, which are relationships between two people. They also study triads, which are groups of three individuals. A triad is important for studying balance and transitivity. For example, Fritz Heider’s balance theory uses triads to explain social dynamics. A rivalrous love triangle is an example of an unbalanced triad.

Researchers also look at subsets like cliques, which are cohesive subgroups.

The history of this field began with several important thinkers. In the late 1890s, Émile Durkheim and Ferdinand Tönnies shared early ideas. Tönnies described two types of social groups. He called personal, direct ties Gemeinschaft, which means community. He called impersonal, formal links Gesellschaft, which means society. At the turn of the twentieth century, Georg Simmel studied network size. He examined how the size of a network affects human interaction. In the 1930s, Jacob Moreno developed the first sociograms. These were visual tools used to study interpersonal relationships.

Many different academic paths eventually merged into one field. In the 1930s, anthropologists like Bronislaw Malinowski and Claude Lévi-Strauss studied social structures. At the same time, Talcott Parsons worked in sociology to establish a relational approach. By the 1970s, scholars began combining these different traditions. Harrison White and his students at Harvard University were central to this movement. During this time, Stanley Milgram developed his famous thesis on the "six degrees of separation." This idea explores how people are connected through chains of acquaintances.

Modern developments have changed how we view digital connections. In the late 1990s, new models emerged to study online social networks. Researchers like Duncan J. Watts and Albert-László Barabási used new data. They studied "digital traces" left by face-to-face interactions. These researchers applied mathematical models to understand complex systems. This work helped bridge the gap between sociology and physics. It allowed for the study of large-scale patterns in a digital world.

These models help explain how networks organize themselves.

Social networks are often self-organizing and emergent. This means a global pattern appears from local interactions. As a network grows in size, these patterns become more apparent. However, analyzing every relationship in the world is not feasible. Limits in computing power and ethics prevent global-scale analysis. Researchers must choose a scale that fits their specific question. They might focus on centrality, which is the importance of a node.

This helps them understand the influence of specific parts. By studying these connections, we gain insight into the complex systems of our world.