Why Is Social Impact Theory Important?


Jane Flores

Social Impact Theory is a concept that highlights how individuals are influenced by others in social situations. Developed by Bibb Latané and John Darley in the late 1960s, this theory explains how people’s behavior, thoughts, and feelings are impacted by the presence of others.

What is Social Impact Theory?

Social Impact Theory suggests that people’s behavior is influenced by three main factors: strength, immediacy, and number. Strength refers to how important the source of influence is to the individual.

Immediacy refers to how close the source of influence is to the individual. Number refers to the number of sources of influence present.

For instance, a person may be more likely to conform to a group if they feel that group members are important or have expertise in a particular area. The closer the group members are physically, the more likely an individual is to conform as well. Additionally, if there are more people in the group who share similar beliefs or opinions, an individual may be more likely to conform.

The Importance of Social Impact Theory

Social Impact Theory has several implications for understanding human behavior and social dynamics. First and foremost, it helps us understand why people conform to social norms or behave in certain ways in response to others’ actions.

For example, imagine a situation where you witness someone littering on the street. If there are no other individuals around you may feel confident enough to approach them and voice your disapproval. However, if there are many other individuals around who do not react negatively then you may be less likely to express your disapproval because you don’t want to stand out from the crowd.

Real Life Applications of Social Impact Theory

Understanding Social Impact Theory can help us navigate various real-life situations such as:


Marketers often use Social Impact Theory when creating advertisements that aim at making us feel like we belong to a particular group. For instance, ads that suggest that ‘everyone is using our product’, may influence an individual to conform and purchase the product.


Political leaders often use social proof as a tactic to convince people to support certain policies or candidates. The more people who support a particular policy or candidate, the more likely others are to follow suit.

Personal Relationships:

Social Impact Theory can also help us understand how we perceive and interact with others in our personal relationships. For example, if a person is in a relationship with someone who is highly respected by their community, they may be more likely to conform to their partner’s opinions or beliefs.


In conclusion, Social Impact Theory helps us understand the complex ways in which social situations can influence our behavior and decisions. By understanding this theory, we can better navigate various social situations and make informed decisions that align with our values and beliefs.