
The term group can refer to a wide variety of gatherings, from just two people to large collectives. Groups can be broadly categorized into primary and secondary groups, with the former being smaller and more emotionally significant, and the latter being larger, more impersonal, and task-oriented. People join groups to satisfy their need to belong, gain information, and define their sense of self and social identity. These groups can experience groupthink, which can lead to polarization and biased decision-making. In-group bias, or in-group favoritism, is a tendency for people to prefer their own group over others, even when group membership is arbitrary. This bias can influence how we perceive the actions of others and can lead to intergroup conflict. Understanding the dynamics of groups is crucial for avoiding the pitfalls of groupthink and promoting cohesive and productive teamwork.
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Primary groups
The term "group" can refer to a wide variety of gatherings, from just two people to large crowds. However, the focus here is on "primary groups," a term coined by sociologist Charles Horton Cooley in 1909 to describe small, intimate circles of emotionally significant relationships.
The need to belong is a fundamental human motivation, and primary groups satisfy this need. They provide us with a sense of belonging, social support, and assistance. According to Leon Festinger's social comparison theory (1950, 1954), people often join groups to evaluate the accuracy of their personal beliefs and attitudes. Stanley Schachter's research in 1959 supported this idea, finding that individuals in ambiguous and stressful situations preferred to wait with others rather than alone, especially those who provided reassurance and accurate information.
In-group bias, also known as in-group favoritism, is a phenomenon where individuals give preferential treatment to those within their group. This bias occurs even in arbitrarily assigned groups, indicating that group membership can influence our perceptions and decisions at a neurological level. People tend to evaluate the actions of their group members more favourably and perceive them as more unique compared to outgroup members, contributing to the out-group homogeneity effect.
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Secondary groups
According to sociologist Charles Horton Cooley, groups can be divided into two categories: primary groups and secondary groups. This answer will focus on secondary groups.
In-group bias (also known as in-group favoritism) is the tendency for people to give preferential treatment to others who belong to the same group as them. This bias can occur even in arbitrarily assigned groups where group members have nothing in common other than the group to which they were assigned. In-group bias can be influenced by unconscious decision-making processes that occur at the neurological level. For example, people tend to evaluate the actions of their own group or team members more favourably than those of outgroup members.
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In-group and out-group
The human brain has an innate tendency to divide the world into "us" and "them", with the in-group and out-group categories being socially contingent and vulnerable to propaganda. This psychological categorization is associated with various phenomena, such as in-group favoritism, where people prefer and have an affinity for their own group over others. This bias occurs even in arbitrarily assigned groups and can influence how we perceive and evaluate the actions of others. Research suggests that this bias has roots in unconscious neurological decision-making processes, with individuals more quickly and accurately recognizing faces of in-group members. The devaluation and dehumanization of out-group members contribute to the out-group homogeneity effect, where they are perceived as more similar to each other than in-group members.
Groups are essential to our understanding of people, as they influence and shape our identities, provide a sense of belonging, and help us satisfy our need for social comparison and self-definition. They can range from small primary groups like families to larger secondary groups with specific functions, and they can be based on shared interests, identities, or even online communities.
In-group favoritism can have both positive and negative consequences. On the one hand, it can foster a sense of community, cooperation, and mutual support within a group. People tend to seek out groups that provide reassurance, accurate information, and a sense of belonging. On the other hand, in-group favoritism can lead to negative outcomes such as intergroup conflict, discrimination, and the dehumanization of out-group members.
Groups can also experience groupthink, which is influenced by factors such as cohesiveness, isolation, biased leadership, and stress. To avoid negative outcomes like polarization and groupthink, groups should encourage open inquiry, admit the possibility of failure, and engage in full discussions of different perspectives.
Overall, the concept of in-group and out-group dynamics plays a significant role in understanding human behavior and group interactions, and it has important implications for various fields, including psychology, sociology, and decision science.
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Interest groups
There are various types of interest groups, including business groups, labour groups, farm groups, and professional groups. Business groups, such as the Canadian Federation of Independent Business or Nestlé SA, advocate for the interests of businesses and entrepreneurs. Labour groups, like the Trades Union Congress in the United Kingdom, represent the rights and interests of workers. Farm groups, such as the American Farm Bureau Federation, promote the interests of farmers and agricultural communities. Professional groups, including the American Bar Association, focus on the interests of specific professions or industries.
Cause groups are another type of interest group that represents a particular segment of society. These groups are primarily focused on promoting a specific cause or value rather than economic interests. For example, Amnesty International is an international non-governmental organization that works to protect human rights and campaigns for the release of prisoners of conscience worldwide.
Individuals often find value in joining interest groups to satisfy their need for social comparison and validation of their personal beliefs and attitudes. According to Leon Festinger's theory of social comparison, people tend to seek out groups that provide reassurance, support, and accurate information. Interest groups can also help individuals answer existential questions about their identity and sense of self. By joining groups with shared interests and values, individuals can define themselves not just as "me" but also as "we".
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Social groups
The term 'social groups' can refer to a wide variety of gatherings, from just two people to large groups of people who share a hobby, profession, or cause. Social groups are significant because they satisfy our need to belong, provide information, assistance, and social support. They also help us define our sense of self and social identity, and they can influence our perceptions and evaluations of others.
Sociologist Charles Horton Cooley suggested that social groups can be divided into two categories: primary groups and secondary groups. Primary groups play a critical role in our lives and are usually small, long-term, and emotionally significant. They are made up of individuals with whom we interact face-to-face and who have a significant impact on our socialization, such as family members. Secondary groups, on the other hand, are often larger and more impersonal, task-focused, and time-limited. They serve an instrumental function rather than an expressive one and are more goal- or task-oriented than emotional.
In-group bias, or in-group favoritism, is a tendency for people to prefer and give preferential treatment to members of their own group over those outside the group. This bias can occur even in arbitrarily assigned groups and can influence how we perceive and evaluate the actions of others. For example, we may view the same action very differently depending on whether it was performed by an in-group or out-group member.
In summary, social groups are an essential part of our lives, providing us with a sense of belonging, information, and social support, while also influencing our perceptions and evaluations of others. They can be categorized in various ways, such as primary and secondary groups, in-groups and out-groups, and interest groups.
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Frequently asked questions
Groups can be categorised in several ways, including:
- Primary and secondary groups: Primary groups are usually small and consist of individuals who interact face-to-face in long-term, emotionally significant ways, such as family. Secondary groups are often larger and more impersonal, serving a specific function or goal.
- In-group and out-group: This categorisation is based on the "us vs them" mentality, where individuals favour those in their in-group over the out-group, even when groups are arbitrarily assigned.
- Interest groups: These are groups that promote programs and disseminate information to further the professional, business, social, or avocational interests of their members. They can be further divided into business, labour, farm, and professional groups.
- Aggregates or crowds: While a group has a shared sense of identity and frequent interaction, an aggregate or crowd refers to people who exist in the same place at the same time without a strong sense of connection.
People form groups to satisfy their need to belong, gain information, and define their sense of self and social identity. Groups provide social support, assistance, and a sense of community. They also help individuals evaluate their personal beliefs and attitudes by comparing them with others.
Groups can influence individuals by providing a sense of belonging, guidance, and support. They can shape one's beliefs, attitudes, and behaviours, as well as provide a means to achieve goals that may be difficult to attain alone. Group membership becomes part of one's identity, influencing how individuals perceive themselves and others.

























