










Wilhelm Wundt (1832–1920), credited as the founder of experimental psychology,
had a particular interest in the psychology of "communities",





Ultimately, it was social psychologist Kurt Lewin (1890–1947) who coined the term



An increasing amount of research has applied evolutionary psychology principles to
"Group Dynamics". 
Examples includes mechanisms for dealing with status, reciprocity, identifying
cheaters, ostracism, altruism, 

Sigmund Freud
In Group Psychology and the Analysis of the Ego, (1922), Sigmund Freud based his
preliminary description of group psychology on Le Bon's work, but went on to
develop his own, original theory, related to what he had begun to elaborate in Totem
and Taboo. Theodor Adorno reprised Freud's essay in 1951 with his
clearly foresaw the rise and nature of fascist mass movements in purely
psychological categories."
Jacob L. Moreno
Jacob L. Moreno was a psychiatrist, dramatist, philosopher, and theoretician who
coined the term "group psychotherapy" in the early 1930s and was highly influential
at the time.
Kurt Lewin
Kurt Lewin (1943, 1948, 1951) is commonly identified as the founder of the movement to study groups scientifically. He coined the term
Group dynamics can be defined as a field of inquiry dedicated to the advancing
knowledge about the nature of groups, the laws of their development and their
interrelations with individuals, other groups and larger institutions. Based on their
feelings and emotions, members of a group form a common perception. The
interactive psychological relationship in which members of a group form this
common perception is actually 




Richard Hackman developed a synthetic, research-based model for designing and
managing workgroups. Hackman suggested that groups are successful when they satisfy internal and external clients, develop capabilities to perform in the future, and
when members find meaning and satisfaction in the group. Hackman proposed five
conditions that increase the chance that groups will be successful. 

5. Expert coaching: which occurs on rare occasions when group members
feel they need help with a task or interpersonal issues. Hackman emphasizes
that many team leaders are overbearing and undermine group effectiveness.
4.3 Intragroup dynamics
Intragroup dynamics (also referred to as ingroup-, within-group, or commonly just
‘group dynamics’) are the underlying processes that give rise to a set of norms, roles,
relations, and common goals that characterize a particular social group. 


For each of these groups, there are distinct dynamics that can be discussed. Notably,
on this very broad level, the study of group dynamics is similar to the study of culture. 


The social group is a critical source of information about individual identity. An
individual’s identity (or self-concept) has two components: personal identity and
social identity (or collective self). One’s personal identity is defined by more
idiosyncratic, individual qualities and attributes. In contrast, one’s social identity is
defined by his or her group membership, and the general characteristics (or
prototypes) that define the group and differentiate it from others. 




4.3.4 Black sheep effect
Beliefs within the ingroup are based on how individuals in the group see their other
members. Individuals tend to upgrade likable in-group members and deviate from
unlikeable group members, making them a separate outgroup. This is called the black sheep effect. A person's beliefs about the group may be changed depending
upon whether they are part of the in-group or out-group.
New members of a group must prove themselves to the full members, or “oldtimers”, to become accepted. Full members have undergone socialization and are
already accepted within the group. 

In situations of hazing within fraternities and sororities on college campuses, pledges
may encounter this type of situation and may outwardly comply with the tasks they
are forced to do regardless of their personal feelings about the Greek institution they
are joining. This is done in an effort to avoid becoming an outcast of the group.
Outcasts who behave in a way that might jeopardize the group tend to be treated
more harshly than the likable ones in a group, creating a black sheep effect. 

Intergroup dynamics
Intergroup dynamics refers to the behavioral and psychological relationship between
two or more groups. This includes perceptions, attitudes, opinions, and behaviors
towards one’s own group, as well as those towards another group. In some cases,
intergroup dynamics is prosocial, positive, and beneficial (for example, when
multiple research teams work together to accomplish a task or goal). In other cases,
intergroup dynamics can create conflict. For example, Fischer & Ferlie found
initially positive dynamics between a clinical institution and its external authorities
dramatically changed to a 'hot' and intractable conflict when authorities interfered
with its embedded clinical model. Similarly, underlying the 1999 Columbine High
A school shooting in Littleton, Colorado, United States, intergroup dynamics played a
a significant role in Eric Harris’ and Dylan Klebold’s decision to kill a teacher and 14
students (including themselves).
Intergroup conflict
According to Social Identity Theory, intergroup conflict starts with a process of
comparison between individuals in one group (the ingroup) to those of another group
(the outgroup). This comparison process is not unbiased and objective. Instead, it is
a mechanism for enhancing one’s self-esteem. In the process of such comparisons,
an individual tends to:
favor the ingroup over the outgroup
exaggerate and overgeneralize the differences between the ingroup and the
outgroup (to enhance group distinctiveness)
minimize the perception of differences between ingroup members
remember more detailed and positive information about the ingroup and more
negative information about the outgroup.
Even without any intergroup interaction (as in the minimal group paradigm),
individuals begin to show favoritism towards their own group and negative reactions towards the outgroup. This conflict can result in prejudice, stereotypes, and
discrimination. Intergroup conflict can be highly competitive, especially for social
groups with a long history of conflict, In contrast, intergroup
competition can sometimes be relatively harmless, particularly in situations where
there is a little history of conflict (for example, between students of different
universities) leading to relatively harmless generalizations and mild competitive
behaviors. Intergroup conflict is commonly recognized amidst racial, ethnic,
religious, and political groups.
The formation of intergroup conflict was investigated in a popular series of studies
by Muzafer Sherif and colleagues in 1961, called the Robbers Cave Experiment. The
Robbers Cave Experiment was later used to support Realistic conflict theory.
Other
prominent theories relating to intergroup conflict include Social Dominance Theory and social-/Self-categorization Theory.
Intergroup conflict reduction
There have been several strategies developed for reducing the tension, bias,
prejudice, and conflict between social groups. 
Superordinate identities
Under the contract, several models have been developed. A number of
these models utilize a superordinate identity to reduce prejudice. 

Models utilizing superordinate identities include the common ingroup identity
model, the ingroup projection model, the mutual intergroup differentiation model,
and the ingroup identity model.
4.3.11 Interdependence
There are also techniques for reducing prejudice that utilize interdependence
between two or more groups. That is, members across groups have to rely on one
another to accomplish some goal or task.




