Social categorization is a fundamental concept in social identity theory. It refers to the process of classifying individuals into distinct groups based on certain characteristics or attributes. The theory posits that people have an innate tendency to categorize themselves and others into different social groups, such as nationality, gender, age, occupation, and so on.

Why is Social Categorization Important?

Social categorization plays a crucial role in shaping our social identities and influencing our behavior towards others. It helps us simplify the complex social world by organizing individuals into easily identifiable groups. By doing so, it allows us to quickly make sense of our surroundings and understand where we fit in.

The Process of Social Categorization

The process of social categorization can be understood through three key stages: perception, categorization, and evaluation.

1. Perception: In this stage, we perceive various cues or signals from the environment that help us identify the relevant categories to which individuals belong. These cues can be visual (e.g., physical appearance) or auditory (e., accent).

2. Categorization: Once we have perceived these cues, we mentally place individuals into categories based on the similarities or differences we observe. For example, if we notice someone wearing a white coat and carrying a stethoscope, we might categorize them as a doctor.

3. Evaluation: After categorizing individuals, we tend to evaluate them based on the stereotypes associated with their particular category.

Stereotypes are generalized beliefs and expectations about the characteristics and behaviors of group members. These evaluations can lead to bias or prejudice towards certain groups.

Social Identity Theory and Social Categorization

Social identity theory, developed by Henri Tajfel and John Turner in the 1970s, explains how social categorization influences our self-concept and intergroup behavior. According to this theory, we strive to maintain a positive social identity by enhancing the status of in-groups (groups we belong to) and derogating out-groups (groups we do not belong to).

In-Group Favoritism

One consequence of social categorization is in-group favoritism. This refers to the tendency for individuals to show preferential treatment towards members of their own group. In-group favoritism can lead to a sense of belonging and solidarity within the group, but it can also result in discrimination or unfair treatment towards out-group members.

Out-Group Homogeneity

Another effect of social categorization is the perception of out-group homogeneity. This refers to the tendency for individuals to see members of an out-group as more similar to each other than they actually are. It can lead to overgeneralizations and stereotypes about out-group members, which further perpetuate biases and prejudice.


In conclusion, social categorization is a fundamental process in social identity theory. It helps us make sense of our social world by organizing individuals into distinct groups based on certain characteristics.

However, it also has consequences such as in-group favoritism and out-group homogeneity that can impact our behavior towards others. By understanding these processes, we can strive for more inclusive and equitable interactions with people from different social groups.