Intergroup relations

<h2 id="history">History</h2>
While philosophers and thinkers have written about topics related to intergroup relations dating back to <a href="/facts/Aristotle/U2bDlBFW">Aristotle</a>'s <a href="/facts/Politics_(Aristotle)/TwQVBFDv">Politics</a>,<a class="footnote-ref" id="fnref:5" href="#fn:5">5</a> the psychological study of group attitudes and behavior began in the late 19th century.<a class="footnote-ref" id="fnref:6" href="#fn:6">6</a> One of the earliest scientific publications on group processes is <a href="/facts/The_Crowd%3a_A_Study_of_the_Popular_Mind/r3VhU1zf">The Crowd: A Study of the Popular Mind</a>, written in 1895 by French doctor and scientist <a href="/facts/Gustave_Le_Bon/aLlqSLA4">Gustave Le Bon</a>. Le Bon proposed that a group of individuals is different from the sum of its parts (often paraphrased as "a group is more than the sum of its parts"). This fundamental idea of <a href="/facts/Crowd_psychology/kG2ksW8C">crowd psychology</a> states that when individuals form a group, this group behaves differently than each individual would normally act. Le Bon theorized that when individuals formed a group or crowd, there would emerge a new psychological construct which would be shaped by the group's "<a href="/facts/Racial_unconscious/PVzLWU5q">racial [collective] unconscious</a>."<a class="footnote-ref" id="fnref:7" href="#fn:7">7</a> Le Bon put forth three phenomena that explained crowd behavior: submergence (or anonymity), when individuals lose their sense of self and responsibility by joining a crowd, contagion, the tendency for individuals in a crowd to follow the beliefs and behaviors of the crowd, and suggestion, which refers to how the beliefs and behaviors of the crowd are shaped by a shared <a href="/facts/Collective_unconscious/PVzLWU5q">racial unconscious.</a><a class="footnote-ref" id="fnref:8" href="#fn:8">8</a> Subsequent generations of intergroup relations and <a href="/facts/Social_influence/jR84Vghj">social influence</a> researchers built from these foundational ideas and explored them through empirical studies.<a class="footnote-ref" id="fnref:9" href="#fn:9">9</a>
The empirical study of intergroup relations, as well as the broader field of <a href="/facts/Social_psychology/VfEKM8U0">social psychology</a>, grew tremendously in the years following <a href="/facts/World_War_II/2efV5L1U">World War II</a>. The events of <a href="/facts/World_War_II/2efV5L1U">World War II</a>, including the rise of <a href="/facts/Adolf_Hitler/3zyXG1L8">Adolf Hitler</a> and <a href="/facts/Fascism/EhQWcPsE">Fascism</a>, the <a href="/facts/The_Holocaust/vGQsAb2y">Holocaust</a>, and the widespread use of <a href="/facts/Propaganda_in_Nazi_Germany/w6lEzsm7">propaganda</a>, led many social scientists to study <a href="/facts/Group_conflict/1Ehq38Us">intergroup conflict</a>, <a href="/facts/Obedience_(human_behavior)/IV9MWnJa">obedience</a>, <a href="/facts/Conformity/AHpHbocb">conformity</a>, <a href="/facts/Dehumanization/bp0VlKGF">dehumanization</a>, and other related phenomena.<a class="footnote-ref" id="fnref:10" href="#fn:10">10</a> Social scientists were interested in understanding the behavior of the German population under <a href="/facts/Nazi_Germany/8kRbqRpo">Nazi</a> rule, specifically how their attitudes were influenced by <a href="/facts/Propaganda_in_Nazi_Germany/w6lEzsm7">propaganda</a> and how so many could obey orders to carry out or support the mass murder of Jews and other minority groups as part of the <a href="/facts/The_Holocaust/vGQsAb2y">Holocaust.</a><a class="footnote-ref" id="fnref:11" href="#fn:11">11</a> Several prominent social psychologists were directly affected by the Nazi's actions because of their <a href="/facts/Jews/T9Y4wE6A">Jewish</a> faith, including <a href="/facts/Kurt_Lewin/1ynHQMnf">Kurt Lewin</a>, <a href="/facts/Fritz_Heider/Ij3CzkEH">Fritz Heider</a>, and <a href="/facts/Solomon_Asch/6vSFRXyy">Solomon Asch</a>. <a href="/facts/Muzafer_Sherif/mbped9mr">Muzafer Sherif</a> was briefly detained by the Turkish government in 1944 for his pro-communist and anti-fascist beliefs.<a class="footnote-ref" id="fnref:12" href="#fn:12">12</a> These scientists would draw from these experiences and go on to make major theoretical contributions to intergroup relations research as well as the broader field of <a href="/facts/Psychology/duoqW7Sz">psychology</a>.<a class="footnote-ref" id="fnref:13" href="#fn:13">13</a>
The <a href="/facts/Cognitive_revolution/rRdkd5Sc">cognitive revolution</a> in <a href="/facts/Psychology/duoqW7Sz">psychology</a> in the 1950s and 60s led researchers to study how <a href="/facts/Cognitive_bias/49YKVhmN">cognitive biases</a> and <a href="/facts/Heuristics_in_judgment_and_decision-making/gwyv5AkX">heuristics</a> influence beliefs and behavior.<a class="footnote-ref" id="fnref:14" href="#fn:14">14</a> The resulting focus on <a href="/facts/Cognition/ga0tSBul">cognitive processes</a> and <a href="/facts/Meaning-making/JnBEdtGI">meaning-making</a> represented a significant shift away from the mainstream <a href="/facts/Behaviorism/8DHljqrh">behaviorist</a> philosophy that shaped much of psychology research in the first half of the 20th century.<a class="footnote-ref" id="fnref:15" href="#fn:15">15</a> During and after the cognitive revolution, intergroup relations researchers began to study <a href="/facts/Bias/geuh5KrE">cognitive biases</a>, <a href="/facts/Heuristic/BcBEkv9c">heuristics</a>, and <a href="/facts/Stereotype/UDveLU8n">stereotypes</a> and their influences on beliefs and behavior.<a class="footnote-ref" id="fnref:16" href="#fn:16">16</a> <a href="/facts/Asch_conformity_experiments/0DWU6sET">Solomon Asch's studies on conformity</a> in the 1950s were among the first experiments to explore how a cognitive process (the need to conform to the behavior of the group) could override individual preferences to directly influence behavior.<a class="footnote-ref" id="fnref:17" href="#fn:17">17</a> <a href="/facts/Leon_Festinger/7llwTxcQ">Leon Festinger</a> also focused on cognitive processes in developing <a href="/facts/Cognitive_dissonance/j0xK7w6S">cognitive dissonance</a> theory,<a class="footnote-ref" id="fnref:18" href="#fn:18">18</a> which <a href="/facts/Elliot_Aronson/zcFbBmI6">Elliot Aronson</a> and other researchers would later build upon to describe how individuals feel liking for a group they were initiated into but whose views they may not agree with.<a class="footnote-ref" id="fnref:19" href="#fn:19">19</a>
The <a href="/facts/Civil_rights_movement/llwscvvR">Civil Rights Movement</a> of the 1950s and 60s led social scientists to study <a href="/facts/Prejudice/6Pwnfk9d">prejudice</a>, <a href="/facts/Discrimination/B2M2HqxR">discrimination</a>, and <a href="/facts/Collective_action/dQVaLvdn">collective action</a> in the context of race in America. In 1952, the <a href="/facts/NAACP/gXSqUxTo">NAACP</a> put out a call for social science research to further study these issues in light of the <a href="/facts/Brown_v._Board_of_Education/g8KI1T4g">Brown v. Board of Education lawsuit</a>.<a class="footnote-ref" id="fnref:20" href="#fn:20">20</a> <a href="/facts/Gordon_Allport/AC75tDkl">Gordon Allport</a>'s 1954 book <a href="/facts/The_Nature_of_Prejudice/JfF43lqB">The Nature of Prejudice</a> provided the first theoretical framework for understanding and counteracting prejudice, and cemented prejudice as a central focus of social psychology.<a class="footnote-ref" id="fnref:21" href="#fn:21">21</a> In his book, Allport proposed the <a href="/facts/Contact_hypothesis/lA2jS7W7">contact hypothesis</a> which states that interpersonal contact, under the correct conditions, can be an effective means of reducing <a href="/facts/Prejudice/6Pwnfk9d">prejudice</a>, <a href="/facts/Discrimination/B2M2HqxR">discrimination</a>, and reliance on <a href="/facts/Stereotype/UDveLU8n">stereotypes</a>.<a class="footnote-ref" id="fnref:22" href="#fn:22">22</a><a class="footnote-ref" id="fnref:23" href="#fn:23">23</a> Subsequent generations of scientists built on and applied Allport's <a href="/facts/Contact_hypothesis/lA2jS7W7">contact hypothesis</a> to other domains of <a href="/facts/Prejudice/6Pwnfk9d">prejudice</a> including <a href="/facts/Sexism/laBoxq0Q">sexism</a>, <a href="/facts/Homophobia/Xzeqopl5">homophobia</a>, and <a href="/facts/Ableism/jv0eaWgz">ableism</a>.<a class="footnote-ref" id="fnref:24" href="#fn:24">24</a>
In 1967, <a href="/facts/Martin_Luther_King_Jr./dhWS0DP0">Martin Luther King</a> spoke at the annual meeting of the <a href="/facts/American_Psychological_Association/907fEfuc">American Psychological Association</a> urging social scientists to advance causes of social justice in their research.<a class="footnote-ref" id="fnref:25" href="#fn:25">25</a> In his speech, King called on scientists to study many topics related to the <a href="/facts/Civil_rights_movement/llwscvvR">civil rights movement</a>, including the barriers to upward <a href="/facts/Social_mobility/90ofD8YP">social mobility</a> for African Americans, political engagement and action in the African American community, and the processes of psychological and ideological change among African Americans and Whites.<a class="footnote-ref" id="fnref:26" href="#fn:26">26</a>
Intergroup relations research in the final decades of the 20th century refined earlier theories and applied insights from the field in real-world settings. For example, <a href="/facts/Lee_Ross/4R0YIAFQ">Lee Ross</a> applied his research on <a href="/facts/Fundamental_attribution_error/C6XVbSVp">correspondence biases and attributional errors</a> in his work on the <a href="/facts/Conflict_resolution/vovgnlwG">conflict resolution</a> process in Northern Ireland during <a href="/facts/The_Troubles/CvxR8ReG">The Troubles</a>.<a class="footnote-ref" id="fnref:27" href="#fn:27">27</a>
Other researchers have focused on positive elements of intergroup behavior, including <a href="/facts/Helping_behavior/yN0MJ0ck">helping</a>, <a href="/facts/Cooperation/G7HKPKXj">cooperation</a>, and <a href="/facts/Altruism/ztvkVwW1">altruism</a> between groups.<a class="footnote-ref" id="fnref:28" href="#fn:28">28</a><a class="footnote-ref" id="fnref:29" href="#fn:29">29</a> One example of this is a recent field study by <a href="/facts/Betsy_Levy_Paluck/TautU3Y0">Betsy Paluck</a> and colleagues, where they used a radio drama infused with positive social norms to increase reconciliation behaviors and attitudes among an entire village in Rwanda.<a class="footnote-ref" id="fnref:30" href="#fn:30">30</a>
Researchers have also applied intergroup theories to workplace settings; one such example is Richard Hackman's work on creating and managing groups or teams in the workplace. Hackman proposed that teams and work groups are successful when specific conditions are met. Specifically, when members of the team and their clients are satisfied, team members are able to grow professionally, and team members find their work meaningful.<a class="footnote-ref" id="fnref:31" href="#fn:31">31</a>
The advancement of technology has also shaped the study of intergroup relations, first with the adoption of computer software and later with the utilization of <a href="/facts/Neuroimaging/dA5Cteaf">neuro-imaging</a> techniques such as <a href="/facts/Functional_magnetic_resonance_imaging/GIayRTAL">fMRI</a>.<a class="footnote-ref" id="fnref:32" href="#fn:32">32</a> One example of psychologists leveraging new technology to advance intergroup relations research is the <a href="/facts/Implicit-association_test/pIejuAu7">implicit-association test</a> (IAT), developed by <a href="/facts/Anthony_Greenwald/om1BfzLl">Anthony Greenwald</a> and colleagues in 1998 as a means to measure the strength of implicit (automatic) association of between different mental representations of objects.<a class="footnote-ref" id="fnref:33" href="#fn:33">33</a> The IAT is commonly used to measure the strength of <a href="/facts/Implicit_stereotype/QkFRJeB6">implicit bias</a> for a variety of constructs including gender-workplace stereotypes and stereotypes about <a href="/facts/Race_and_ethnicity_in_the_United_States/z6SSUuvf">race</a>.<a class="footnote-ref" id="fnref:34" href="#fn:34">34</a><a class="footnote-ref" id="fnref:35" href="#fn:35">35</a>

<h2 id="foundational-theories">Foundational theories</h2>
<h3>Contact hypothesis</h3>
Main article: <a href="/facts/Contact_hypothesis/lA2jS7W7">Contact hypothesis</a><a href="/facts/Gordon_Allport/AC75tDkl">Gordon Allport</a> developed this hypothesis, which states that contact with members of another social group in the appropriate circumstances can lead to a reduction of <a href="/facts/Prejudice/6Pwnfk9d">prejudice</a> between majority and minority group members.<a class="footnote-ref" id="fnref:36" href="#fn:36">36</a> There are three psychological processes underlying the <a href="/facts/Contact_hypothesis/lA2jS7W7">contact hypothesis</a>: learning about the outgroup through direct contact, fear and anxiety reduction when interacting with the outgroup, and increased ability to <a href="/facts/Perspective-taking/RQXBbHBC">perspective take</a> and empathize with the outgroup which results in reduced negative evaluation.<a class="footnote-ref" id="fnref:37" href="#fn:37">37</a><a class="footnote-ref" id="fnref:38" href="#fn:38">38</a> These processes take place optimally when four conditions are met. Groups must:
<ol><li>Have relatively equal status</li>
<li>Have shared goals</li>
<li>Be able to cooperate with each other</li>
<li>Recognize an authority or law that supports interactions between the two groups.<a class="footnote-ref" id="fnref:39" href="#fn:39">39</a></li></ol>
Some researchers have critiqued the <a href="/facts/Contact_hypothesis/lA2jS7W7">contact hypothesis</a>, specifically its generalizability and the fact that intergroup contact can result in an increase rather than decrease in prejudice.<a class="footnote-ref" id="fnref:40" href="#fn:40">40</a><a class="footnote-ref" id="fnref:41" href="#fn:41">41</a>

<h3>Realistic conflict theory</h3>
Main article: <a href="/facts/Realistic_conflict_theory/tH7Y7V7m">Realistic conflict theory</a><a href="/facts/Realistic_conflict_theory/tH7Y7V7m">Realistic Conflict Theory</a> (RCT), also known as Realistic Group Conflict Theory (RGCT), is a model of <a href="/facts/Group_conflict/1Ehq38Us">intergroup conflict</a> that describes how conflict and <a href="/facts/Prejudice/6Pwnfk9d">prejudice</a> between groups stems from conflicting goals and competition for limited resources.<a class="footnote-ref" id="fnref:42" href="#fn:42">42</a> Groups may compete for concrete resources such as money and land or abstract resources such as political power and social status which leads to hostility-perpetuating <a href="/facts/Zero-sum_thinking/A6YVB4Cv">zero-sum beliefs</a>.<a class="footnote-ref" id="fnref:43" href="#fn:43">43</a> The RCT was originally proposed by <a href="/facts/Donald_T._Campbell/85by17J0">Donald T. Campbell</a> and was later elaborated on in classic experiments by <a href="/facts/Muzafer_Sherif/mbped9mr">Muzafer Sherif</a> and <a href="/facts/Carolyn_Sherif/zrMG1q1W">Carolyn Wood Sherif</a>.<a class="footnote-ref" id="fnref:44" href="#fn:44">44</a><a class="footnote-ref" id="fnref:45" href="#fn:45">45</a> The Sherifs' Robbers Cave experiment provided evidence for the RCT by arbitrarily assigning boys at a summer camp with similar backgrounds to different groups. The boys in these groups then competed with each other and elicited hostile outgroup beliefs until a <a href="/facts/Superordinate_goals/XP21f8oT">superordinate, cooperative goal</a> was imposed that required the groups to work together resulted in decreased feelings of <a href="/facts/Hostility/jDsodz8R">hostility</a>.<a class="footnote-ref" id="fnref:46" href="#fn:46">46</a> Sherif maintained that group behavior cannot result from an analysis of individual behavior and that <a href="/facts/Group_conflict/1Ehq38Us">intergroup conflict</a>, particularly those driven by the competition for scarce resources, creates <a href="/facts/Ethnocentrism/r8HdnN60">ethnocentrism</a>.<a class="footnote-ref" id="fnref:47" href="#fn:47">47</a>
The Robbers Cave Experiment was conducted in 1954 and was designed to test theories of intergroup conflict. The experiment was designed so that there were two groups of campers, the Eagles and the Rattlers. As the independent variable, experimenters devoided the campers of certain rewards and resources. It was found that when there is a limited amount of resources, there will inevitably be conflict between the groups to fight for those resources. Each group in this experiment also did not see the other group as more or even equally favorable as their own. In the end, this competition eventually led to violence and was broken up only through working together (contact theory). This showed that even if you begin unaffiliated with a group, as soon as you find a group that you associate yourself with (become part of in-group), you will take on the qualities and characteristics of the individuals in that group; whatever that group norm is, you inherent as your own.
Source: University of Oklahoma. Institute of Group Relations, and Muzafer Sherif. Intergroup conflict and cooperation: The Robbers Cave experiment. Vol. 10. Norman, OK: University Book Exchange, 1961.

<h3>Social identity approach</h3>
Main articles: <a href="/facts/Social_identity_approach/TuaFENyw">Social identity approach</a>, <a href="/facts/Self-categorization_theory/LWIEjXBk">Self-categorization theory</a>, and <a href="/facts/Social_identity_theory/cr9z7gEW">Social identity theory</a>In the 1970s and 80s, <a href="/facts/Henri_Tajfel/TMX5cfx0">Henri Tajfel</a> and <a href="/facts/John_Turner_(psychologist)/HoepQB2g">John Turner</a> proposed two connected theories of social identity, <a href="/facts/Self-categorization_theory/LWIEjXBk">self-categorization theory</a> and <a href="/facts/Social_identity_theory/cr9z7gEW">social identity theory</a>, that together form a method for understanding the psychological processes underlying how individuals make sense of their identities and group membership.<a class="footnote-ref" id="fnref:48" href="#fn:48">48</a>
<a href="/facts/Self-categorization_theory/LWIEjXBk">Self-categorization theory</a> explains the contexts in which an individual perceives a collection of people as a group and the psychological processes that result from an individual perceiving people in terms of a group.<a class="footnote-ref" id="fnref:49" href="#fn:49">49</a>
<a href="/facts/Social_identity_theory/cr9z7gEW">Social identity theory</a> describes how individual identity is shaped by membership in a social group.<a class="footnote-ref" id="fnref:50" href="#fn:50">50</a> It also predicts differences in intergroup behavior based on perceived status differences between social groups, the legitimacy and stability of those perceived status differences, and ability to move between social groups.<a class="footnote-ref" id="fnref:51" href="#fn:51">51</a><a class="footnote-ref" id="fnref:52" href="#fn:52">52</a>
The <a href="/facts/Social_identity_approach/TuaFENyw">social identity approach</a> has had a wide-ranging impact on <a href="/facts/Social_psychology/VfEKM8U0">social psychology</a>, influencing theory on topics such as <a href="/facts/Social_influence/jR84Vghj">social influence</a>,<a class="footnote-ref" id="fnref:53" href="#fn:53">53</a> <a href="/facts/Self-stereotyping/uT52y5uJ">self-stereotyping</a>,<a class="footnote-ref" id="fnref:54" href="#fn:54">54</a> and <a href="/facts/Personality/zdkhBU5V">personality</a>.<a class="footnote-ref" id="fnref:55" href="#fn:55">55</a>

<h2 id="current-directions">Current directions</h2>
Early research on intergroup relations focused on understanding the processes behind group interactions and dynamics, constructing theories to explain these processes and related psychological phenomena. Presently, intergroup relations is characterized by researchers applying and refining these theories in the context of modern social issues such as addressing <a href="/facts/Social_inequality/mSlMBETI">social inequality</a> and reducing <a href="/facts/Discrimination/B2M2HqxR">discrimination</a> based on <a href="/facts/Gender_identity/GhaeHYtb">gender identity</a>, <a href="/facts/Sexual_orientation/Rcx5r9UB">sexual orientation</a>, <a href="/facts/Race_and_ethnicity_in_the_United_States/z6SSUuvf">race/ethnicity</a>, and <a href="/facts/Religion/cxntrD0R">religion</a>.<a class="footnote-ref" id="fnref:56" href="#fn:56">56</a>

<h3>Prejudice reduction</h3>
Theories from intergroup relations research have informed many <a href="/facts/Approaches_to_prejudice_reduction/hKBJHyC4">approaches to prejudice reduction</a>. Researchers have focused on developing theoretical frameworks for understanding how to effectively reduce <a href="/facts/Group_conflict/1Ehq38Us">intergroup conflict</a> and <a href="/facts/Prejudice/6Pwnfk9d">prejudice</a>.<a class="footnote-ref" id="fnref:57" href="#fn:57">57</a> For example, a recent intervention developed by <a href="/facts/Patricia_Devine/IFzWM5JA">Patricia Devine</a> and colleagues focuses on training individuals to overcome cognitive biases and reduce implicit bias. The intervention resulted in reduced implicit bias up to two months after the intervention was administered.<a class="footnote-ref" id="fnref:58" href="#fn:58">58</a> Other prejudice reduction research has investigated intergroup interaction techniques including cooperative learning (such as <a href="/facts/Elliot_Aronson/zcFbBmI6">Elliot Aronson's</a> "<a href="/facts/Jigsaw_Classroom/5MbKXzlL">Jigsaw Classroom</a>")<a class="footnote-ref" id="fnref:59" href="#fn:59">59</a> and making group identity less salient or a <a href="/facts/Superordinate_goals/XP21f8oT">superordinate</a> identity more salient<a class="footnote-ref" id="fnref:60" href="#fn:60">60</a><a class="footnote-ref" id="fnref:61" href="#fn:61">61</a> in addition to individual techniques such as encouraging <a href="/facts/Perspective-taking/RQXBbHBC">perspective-taking</a> with a member of a stigmatized group and building <a href="/facts/Empathy/Pak5Dvfh">empathy</a> with stigmatized groups.<a class="footnote-ref" id="fnref:62" href="#fn:62">62</a><a class="footnote-ref" id="fnref:63" href="#fn:63">63</a><a class="footnote-ref" id="fnref:64" href="#fn:64">64</a> Another technique that has been studied to reduce prejudice through intergroup relations included sparking interest in another person's culture that was different than their own.<a class="footnote-ref" id="fnref:65" href="#fn:65">65</a> A meta-analysis of 515 studies found that there seemed to be a connection between intergroup contact and lower levels of intergroup prejudice.<a class="footnote-ref" id="fnref:66" href="#fn:66">66</a>
Meta-analyses of <a href="/facts/Implicit_stereotype/QkFRJeB6">implicit bias</a> reduction studies have shown that many produce limited effects that do not persist outside of a laboratory setting.<a class="footnote-ref" id="fnref:67" href="#fn:67">67</a> Some researchers have called for more field research and studies that employ longitudinal designs to test the external validity and durability of existing prejudice reduction techniques, especially workplace diversity programs that may not be informed by empirical research.<a class="footnote-ref" id="fnref:68" href="#fn:68">68</a><a class="footnote-ref" id="fnref:69" href="#fn:69">69</a> There was also a study conducted on how pluralistic ignorance can affect intergroup contact. Their research showed evidence that both in-groups and out-groups can overestimate the other group's lack of interest in intergroup contact.<a class="footnote-ref" id="fnref:70" href="#fn:70">70</a>

<h3>Addressing social inequalities</h3>
Social scientists have examined phenomena related to <a href="/facts/Social_inequality/mSlMBETI">social inequality</a> such as <a href="/facts/Poverty/hNLtrNmK">poverty</a>, <a href="/facts/Disfranchisement/MbsjefME">disenfranchisement</a>, and <a href="/facts/Discrimination/B2M2HqxR">discrimination</a> since the early days of social psychology.<a class="footnote-ref" id="fnref:71" href="#fn:71">71</a> However, researchers have only recently begun developing theories on the psychological consequences and impacts of social inequality.<a class="footnote-ref" id="fnref:72" href="#fn:72">72</a> Current research on social inequality has explored the psychological effects of racially disparate policing practices on minorities,<a class="footnote-ref" id="fnref:73" href="#fn:73">73</a> whites' tendency to underestimate the pain of blacks due to false beliefs in biological differences,<a class="footnote-ref" id="fnref:74" href="#fn:74">74</a> how increasing belonging among students from stigmatized backgrounds can boost their <a href="/facts/GPA/749BBt0h">GPAs</a> and retention rates,<a class="footnote-ref" id="fnref:75" href="#fn:75">75</a> and how <a href="/facts/Psychology_of_social_class/NQh4jgLl">social class</a> influences prosocial behavior.<a class="footnote-ref" id="fnref:76" href="#fn:76">76</a>
A majority of research on <a href="/facts/Social_inequality/mSlMBETI">social inequality</a> has principally focused on single categories such as race and gender. Increasingly, more researchers are exploring the effects of how the <a href="/facts/Intersectionality/55jgWfs5">intersection of identities</a> affect individual and group psychological processes.<a class="footnote-ref" id="fnref:77" href="#fn:77">77</a> For example, <a href="/facts/Judith_Harackiewicz/twxtWvYE">Judith Harackiewicz</a> and her colleagues examined race and social class as related constructs in a utility-value intervention designed to close the racial achievement gap of underrepresented minority students in introductory <a href="/facts/Science%2c_technology%2c_engineering%2c_and_mathematics/NAsAI1nG">STEM</a> college courses.<a class="footnote-ref" id="fnref:78" href="#fn:78">78</a>
Other areas of current intergroup relations research include:

<ul><li>Understanding <a href="/facts/White_backlash/yr2yDapD">white backlash to racial diversity</a><a class="footnote-ref" id="fnref:79" href="#fn:79">79</a><a class="footnote-ref" id="fnref:80" href="#fn:80">80</a><a class="footnote-ref" id="fnref:81" href="#fn:81">81</a></li>
<li></li>
<li>Effectively managing teams and group identities in the workplace<a class="footnote-ref" id="fnref:82" href="#fn:82">82</a><a class="footnote-ref" id="fnref:83" href="#fn:83">83</a></li>
<li>Understanding the psychological processes behind political and ideological <a href="/facts/Group_polarization/rSRm57x9">polarization</a><a class="footnote-ref" id="fnref:84" href="#fn:84">84</a><a class="footnote-ref" id="fnref:85" href="#fn:85">85</a></li>
<li>Further studying cross-cultural communication<a class="footnote-ref" id="fnref:86" href="#fn:86">86</a><a class="footnote-ref" id="fnref:87" href="#fn:87">87</a><a class="footnote-ref" id="fnref:88" href="#fn:88">88</a><a class="footnote-ref" id="fnref:89" href="#fn:89">89</a></li></ul>
<h2 id="notable-figures-19001979">Notable figures (1900–1979)</h2>
<h3>Kurt Lewin</h3>
Main article: <a href="/facts/Kurt_Lewin/1ynHQMnf">Kurt Lewin</a><a href="/facts/Kurt_Lewin/1ynHQMnf">Kurt Lewin</a> is considered to be one of the founding fathers of <a href="/facts/Social_psychology/VfEKM8U0">social psychology</a> and made major contributions to psychological research. Lewin founded the Research Center for Group Dynamics at <a href="/facts/Massachusetts_Institute_of_Technology/Xk49vNA8">MIT</a> in 1945:
"Lewin was interested in the scientific study of the processes that influence individuals in group situations, and the center initially focused on group productivity; communication; social perception; intergroup relations; group membership; leadership and improving the functioning of groups."<a class="footnote-ref" id="fnref:90" href="#fn:90">90</a>
Lewin coined the term <a href="/facts/Group_dynamics/Jo0C0Dfa">group dynamics</a> to describe how individuals and groups behave differently depending on their environmental context.<a class="footnote-ref" id="fnref:91" href="#fn:91">91</a> In terms of intergroup relations, he applied his formula of B = ƒ(P, E) - behavior is a function of the person and their environment - to group behavior. The theory behind this formula, which emphasizes that context shapes behavior in conjunction with an individual's motivations and beliefs, is a cornerstone of social psychological research.<a class="footnote-ref" id="fnref:92" href="#fn:92">92</a> Lewin conducted numerous studies that pioneered the field of <a href="/facts/Industrial_and_organizational_psychology/E5VJQ4Pu">organizational psychology</a>, including the <a href="/facts/Harwood_research/Xaky3DAY">Harwood Research</a> studies which showed that group decision-making, leadership training, and self-management techniques could improve employee productivity.<a class="footnote-ref" id="fnref:93" href="#fn:93">93</a>

<h3>Gordon Allport</h3>
Main article: <a href="/facts/Gordon_Allport/AC75tDkl">Gordon Allport</a>
The American social psychologist <a href="/facts/Gordon_Allport/AC75tDkl">Gordon Allport</a> is considered to be one of the pioneers of the psychological study of intergroup relations. Especially influential is Allport's 1954 book <a href="/facts/The_Nature_of_Prejudice/JfF43lqB">The Nature of Prejudice</a>, which proposed the <a href="/facts/Contact_hypothesis/lA2jS7W7">contact hypothesis</a> and has provided a foundation for research on <a href="/facts/Prejudice/6Pwnfk9d">prejudice</a> and <a href="/facts/Discrimination/B2M2HqxR">discrimination</a> since the mid-1950s.<a class="footnote-ref" id="fnref:94" href="#fn:94">94</a><a class="footnote-ref" id="fnref:95" href="#fn:95">95</a> Allport's contributions to the field are still being elaborated upon by psychologists, with one example being the <a href="/facts/Common_ingroup_identity/NxJfFYcS">common ingroup identity</a> model developed by <a href="/facts/John_Dovidio/dSeMRw06">John Dovidio</a> and Samuel Gaertner in the 1990s.<a class="footnote-ref" id="fnref:96" href="#fn:96">96</a> In honor of Allport's contributions to psychology, the <a href="/facts/Society_for_the_Psychological_Study_of_Social_Issues/NBIeNNQF">Society for the Psychological Study of Social Issues</a> named their annual intergroup relations prize after him.<a class="footnote-ref" id="fnref:97" href="#fn:97">97</a>
Beyond his theoretical contributions to the field, Allport mentored many students who would go on to make important contributions of their own to intergroup relations research. These students include <a href="/facts/Anthony_Greenwald/om1BfzLl">Anthony Greenwald</a>, <a href="/facts/Stanley_Milgram/F2dcafH0">Stanley Milgram</a>, and <a href="/facts/Thomas_F._Pettigrew_(sociologist)/swa2WPB9">Thomas Pettigrew</a>.

<h3>Muzafer Sherif and Carolyn Wood Sherif</h3>
Main articles: <a href="/facts/Muzafer_Sherif/mbped9mr">Muzafer Sherif</a> and <a href="/facts/Carolyn_Sherif/zrMG1q1W">Carolyn Sherif</a><a href="/facts/Muzafer_Sherif/mbped9mr">Muzafer Sherif</a> and <a href="/facts/Carolyn_Sherif/zrMG1q1W">Carolyn Wood Sherif</a> performed multiple notable experiments on the subject in the mid-20th century including the <a href="/facts/Realistic_conflict_theory/tH7Y7V7m">Robbers Cave experiments</a>; these experiments formed the basis for <a href="/facts/Realistic_conflict_theory/tH7Y7V7m">realistic conflict theory</a>.<a class="footnote-ref" id="fnref:98" href="#fn:98">98</a> These studies have had a lasting impact on the field, providing a theoretical explanation for the origin of intergroup <a href="/facts/Prejudice/6Pwnfk9d">prejudice</a> while also exploring techniques to reduce negative attitudes between groups.<a class="footnote-ref" id="fnref:99" href="#fn:99">99</a> The Sherifs proposed that group behavior cannot result from an analysis of individual behavior and that intergroup conflict, particularly those driven by the competition for scarce resources, creates <a href="/facts/Ethnocentrism/r8HdnN60">ethnocentrism</a>.<a class="footnote-ref" id="fnref:100" href="#fn:100">100</a> Muzafer Sherif's research on the psychology of <a href="/facts/Group_conflict/1Ehq38Us">group conflict</a> was informed by his experiences observing and studying discrimination and <a href="/facts/Social_pressure/1RotA8NH">social pressures</a> in the United States and in Turkey.<a class="footnote-ref" id="fnref:101" href="#fn:101">101</a>
<a href="/facts/Carolyn_Sherif/zrMG1q1W">Carolyn Wood Sherif</a>, along with <a href="/facts/Muzafer_Sherif/mbped9mr">Muzafer Sherif</a> and <a href="/facts/Carl_Hovland/mdWQUrcX">Carl Hovland</a>, developed <a href="/facts/Social_judgment_theory/JU2VTAyz">social judgment theory</a>, a model for <a href="/facts/Self-persuasion/zXSgX0JK">self-persuasion</a> that explains how individuals perceive and evaluate new ideas by comparing them with current attitudes.<a class="footnote-ref" id="fnref:102" href="#fn:102">102</a> The theory sought to outline how individuals make sense of persuasive messages and how this can in turn influence individual and group beliefs.<a class="footnote-ref" id="fnref:103" href="#fn:103">103</a>

<h3>Solomon Asch</h3>
Main article: <a href="/facts/Solomon_Asch/6vSFRXyy">Solomon Asch</a>
<a href="/facts/Asch_conformity_experiments/0DWU6sET">Solomon Asch's work on conformity</a> in the 1950s also helped shape the study of intergroup relations by exploring how the social pressures of group membership influence individuals to adhere their behavior, attitudes, and beliefs to <a href="/facts/Social_norm/Qu2jGBz3">group norms</a>.<a class="footnote-ref" id="fnref:104" href="#fn:104">104</a><a class="footnote-ref" id="fnref:105" href="#fn:105">105</a> The results of these studies showed that individuals could yield to group pressure,<a class="footnote-ref" id="fnref:106" href="#fn:106">106</a><a class="footnote-ref" id="fnref:107" href="#fn:107">107</a> with subsequent studies investigating the conditions under which individuals are more or less likely to conform to the behavior of the group.<a class="footnote-ref" id="fnref:108" href="#fn:108">108</a> Asch's research, along with <a href="/facts/Stanley_Milgram_shock_experiments/c4HHnnKd">Stanley Milgram's shock experiments</a>, shed light on the psychological processes underlying <a href="/facts/Obedience_(human_behavior)/IV9MWnJa">obedience</a>, <a href="/facts/Conformity/AHpHbocb">conformity</a>, and authority.<a class="footnote-ref" id="fnref:109" href="#fn:109">109</a>

<h3>Henri Tajfel and John Turner</h3>
Main articles: <a href="/facts/Henri_Tajfel/TMX5cfx0">Henri Tajfel</a> and <a href="/facts/John_Turner_(psychologist)/HoepQB2g">John Turner (psychologist)</a>
British psychologists <a href="/facts/Henri_Tajfel/TMX5cfx0">Henri Tajfel</a> and <a href="/facts/John_Turner_(psychologist)/HoepQB2g">John Turner</a> developed <a href="/facts/Social_identity_theory/cr9z7gEW">social identity theory</a> and later <a href="/facts/Self-categorization_theory/LWIEjXBk">self-categorization theory</a>, pioneering the <a href="/facts/Social_identity_approach/TuaFENyw">social identity approach</a> in psychology in the 1970s and 80s. Tajfel and Turner were among the first psychologists to study the importance of social group membership and explore how the salience of an individual's group membership determined behavior and beliefs in the group context.<a class="footnote-ref" id="fnref:110" href="#fn:110">110</a> Tajfel invented the <a href="/facts/Minimal_group_paradigm/dMbNX43I">minimal groups paradigm</a>, an experimental method of arbitrarily assigning to individuals to groups (e.g., by flipping a coin) which showed that even when individuals were divided into arbitrary, meaningless groups, they tended to show favoritism for their own group.<a class="footnote-ref" id="fnref:111" href="#fn:111">111</a>

<h2 id="notable-figures-1980present">Notable figures (1980–present)</h2>
<h3>Lee Ross</h3>
Main article: <a href="/facts/Lee_Ross/4R0YIAFQ">Lee Ross</a><a href="/facts/Lee_Ross/4R0YIAFQ">Lee Ross</a> has conducted research on several psychological phenomena closely related to intergroup relations including the <a href="/facts/Fundamental_attribution_error/C6XVbSVp">fundamental attribution error</a>, <a href="/facts/Belief_perseverance/kQMCmu8q">belief perseverance</a>, and most recently <a href="/facts/Na%25C3%25AFve_realism_(psychology)/Fwm8F4WA">naive realism</a> - the idea that individuals believe they see the world objectively and that those who disagree with them must be irrational or biased.<a class="footnote-ref" id="fnref:112" href="#fn:112">112</a> In 1984, Ross co-founded the Stanford Center on International Conflict and Negotiation (SCICN), an interdisciplinary research center focused on applying findings from <a href="/facts/Psychology/duoqW7Sz">psychology</a>, <a href="/facts/Law/luzxWkg0">law</a>, and <a href="/facts/Sociology/d2Fd0N87">sociology</a> to help resolve international socio-political conflicts.<a class="footnote-ref" id="fnref:113" href="#fn:113">113</a> Ross and his colleagues at <a href="https://law.stanford.edu/stanford-center-on-international-conflict-and-negotiation-scicn/">SCICN</a> studied many of these concepts as they apply to <a href="/facts/Conflict_resolution/vovgnlwG">conflict resolution</a> and worked on negotiation and resolution efforts in Northern Ireland during <a href="/facts/The_Troubles/CvxR8ReG">The Troubles</a> and in the middle east in the wake of the <a href="/facts/Gulf_War/6LdLnGdo">Gulf War</a>.<a class="footnote-ref" id="fnref:114" href="#fn:114">114</a>
<h3>Susan Fiske</h3>
Main article: <a href="/facts/Susan_Fiske/MXwDRF4W">Susan Fiske</a><a href="/facts/Susan_Fiske/MXwDRF4W">Susan Fiske</a>, along with her colleagues <a href="/facts/Amy_Cuddy/k2orUIyw">Amy Cuddy</a>, Peter Glick, and Jun Xu, developed the <a href="/facts/Stereotype_content_model/nKWKz1ph">stereotype content model</a> which states that stereotypes and intergroup impressions are formed along two dimensions: warmth and competence.<a class="footnote-ref" id="fnref:115" href="#fn:115">115</a> The <a href="/facts/Stereotype_content_model/nKWKz1ph">stereotype content model</a> builds from <a href="/facts/Evolutionary_psychology/hWbw0V9j">evolutionary psychology</a> theory, stating that individuals tend to first assess whether people are a threat (warmth) and then assess how people will act based on the initial assessment (competence). It follows that social groups that compete for real or perceived resources such as money or <a href="/facts/Power_(social_and_political)/Q4feTyU6">political power</a> are considered low on warmth while social groups that are high-status (e.g. in terms of finance or education) are rated high on competence.<a class="footnote-ref" id="fnref:116" href="#fn:116">116</a> Fiske also co-developed the widely used Ambivalent Sexism Inventory, a measure of <a href="/facts/Ambivalent_sexism/5YemdUQ5">hostile sexism and benevolent sexism</a>.<a class="footnote-ref" id="fnref:117" href="#fn:117">117</a><a class="footnote-ref" id="fnref:118" href="#fn:118">118</a>
<h3>Claude Steele</h3>
Main article: <a href="/facts/Claude_Steele/U1Jhxkoq">Claude Steele</a><a href="/facts/Claude_Steele/U1Jhxkoq">Claude Steele</a> and his colleagues Steve Spencer and <a href="/facts/Joshua_Aronson/8L8wsDnU">Joshua Aronson</a> are known for studying <a href="/facts/Stereotype_threat/kypsk9hV">stereotype threat</a> - the situational pressure one feels when they are at risk of confirming a negative stereotype about their group.<a class="footnote-ref" id="fnref:119" href="#fn:119">119</a> Three factors underlie the mechanism of <a href="/facts/Stereotype_threat/kypsk9hV">stereotype threat</a>: stress arousal, performance monitoring, and cognitive efforts to reduce negative thoughts and feelings.<a class="footnote-ref" id="fnref:120" href="#fn:120">120</a> There is evidence that <a href="/facts/Stereotype_threat/kypsk9hV">stereotype threat</a> plays a role in lower academic and professional performance among individuals in negatively stereotyped groups,<a class="footnote-ref" id="fnref:121" href="#fn:121">121</a><a class="footnote-ref" id="fnref:122" href="#fn:122">122</a> although other studies have called this into question.<a class="footnote-ref" id="fnref:123" href="#fn:123">123</a><a class="footnote-ref" id="fnref:124" href="#fn:124">124</a> Steele and his collaborators have studied several forms of interventions to mitigate <a href="/facts/Stereotype_threat/kypsk9hV">stereotype threat</a>, including <a href="/facts/Self-affirmation/yrXahTnF">self-affirmation</a> methods and providing psychologically "wise" critical feedback.<a class="footnote-ref" id="fnref:125" href="#fn:125">125</a><a class="footnote-ref" id="fnref:126" href="#fn:126">126</a>
<h3>Anthony Greenwald</h3>
Main article: <a href="/facts/Anthony_Greenwald/om1BfzLl">Anthony Greenwald</a><a href="/facts/Anthony_Greenwald/om1BfzLl">Anthony Greenwald</a> and colleagues Debbie McGhee and Jordan Schwartz designed the <a href="/facts/Implicit-association_test/pIejuAu7">implicit-association test</a> or IAT. The IAT is used to test the strength of an individual's implicit (automatic) associations between mental representations and is commonly used in intergroup research to test <a href="/facts/Implicit_stereotype/QkFRJeB6">implicit bias</a>. Recently, the validity of the IAT as a measure of implicit bias has been called into question.<a class="footnote-ref" id="fnref:127" href="#fn:127">127</a> Greenwald, who was a student of <a href="/facts/Gordon_Allport/AC75tDkl">Gordon Allport</a>, has also investigated <a href="/facts/In-group_favoritism/9dkeBNIk">in-group favoritism</a> as it relates to <a href="/facts/Discrimination/B2M2HqxR">discrimination</a><a class="footnote-ref" id="fnref:128" href="#fn:128">128</a> and implicit social bias across a variety of topics including effects on medical school admissions and stereotype formation among young children.<a class="footnote-ref" id="fnref:129" href="#fn:129">129</a>
<h3>Jim Sidanius</h3>
Main article: <a href="/facts/Jim_Sidanius/dPJ7IToP">Jim Sidanius</a><a href="/facts/Jim_Sidanius/dPJ7IToP">Jim Sidanius</a> and <a href="/facts/Felicia_Pratto/1LFNQ6Fl">Felicia Pratto</a> developed <a href="/facts/Social_dominance_theory/QeasxnzQ">social dominance theory</a>, which states that most social groups are organized into hierarchies within developed societies.<a class="footnote-ref" id="fnref:130" href="#fn:130">130</a> According to the theory, these hierarchies are based on age, with older individuals having more power, sex, with men having more power than women, and arbitrary-set hierarchies which are culturally defined and can include <a href="/facts/Race_and_ethnicity_in_the_United_States/z6SSUuvf">race/ethnicity</a>, <a href="/facts/Religion/cxntrD0R">religion</a>, and <a href="/facts/Nationality/pK1x6rjn">nationality</a>.<a class="footnote-ref" id="fnref:131" href="#fn:131">131</a> The theory also predicts patterns of <a href="/facts/Group_conflict/1Ehq38Us">group conflict</a> based on a high-power <a href="/facts/Hegemony/I2SBWNgu">hegemonic</a> groups discriminating and oppressing low-power groups, with one mechanism of oppression involving myths that legitimize the hegemonic group's status.<a class="footnote-ref" id="fnref:132" href="#fn:132">132</a> Sidanius developed the <a href="/facts/Social_dominance_orientation/JAx3hzGC">social dominance orientation</a> scale to measure the desire for one's in-group to dominate and be superior to out-groups.<a class="footnote-ref" id="fnref:133" href="#fn:133">133</a>
<h3>Jennifer Richeson</h3>
Main article: <a href="/facts/Jennifer_Richeson/C0KIzqr9">Jennifer Richeson</a><a href="/facts/Jennifer_Richeson/C0KIzqr9">Jennifer Richeson</a> studies racial identity, <a href="/facts/Social_inequality/mSlMBETI">social inequality</a>, and interracial relations with a focus on understanding the psychological processes behind reactions to diversity.<a class="footnote-ref" id="fnref:134" href="#fn:134">134</a> Richeson's research has examined whites' and minorities' reactions to the likely future "<a href="/facts/Majority_minority/xbLNjKXo">majority-minority</a>" demographic in the <a href="/facts/United_States/P0sCdLe5">United States</a>, specifically how whites feel threatened to this increase in diversity and how this threat influences political attitudes and perceptions of immigrants.<a class="footnote-ref" id="fnref:135" href="#fn:135">135</a> In work focusing on <a href="/facts/Social_inequality/mSlMBETI">social inequality</a>, Richeson and her colleagues Michael Kraus and Julian Rucker found that Americans incorrectly estimate the extent to which economic equality has been achieved with both whites and blacks with high and low incomes overestimating race-based economic equality.<a class="footnote-ref" id="fnref:136" href="#fn:136">136</a>
In 2006, Richeson was awarded a <a href="/facts/MacArthur_Fellows_Program/2nF5hIJh">MacArthur Foundation Fellowship</a> for using mixed methods, including <a href="/facts/Functional_magnetic_resonance_imaging/GIayRTAL">fMRI</a>, to show that interracial contact reduces performance on inhibitory tasks because individuals engage in self-control behaviors to handle fears of appearing prejudiced (whites) or fears of being a target of prejudice (blacks).<a class="footnote-ref" id="fnref:137" href="#fn:137">137</a><a class="footnote-ref" id="fnref:138" href="#fn:138">138</a><a class="footnote-ref" id="fnref:139" href="#fn:139">139</a>

<h3>Jennifer Eberhardt</h3>
Main article: <a href="/facts/Jennifer_Eberhardt/C0X6gAmX">Jennifer Eberhardt</a><a href="/facts/Jennifer_Eberhardt/C0X6gAmX">Jennifer Eberhardt</a> conducts research that investigates the psychological associations between <a href="/facts/Race_and_ethnicity_in_the_United_States/z6SSUuvf">race/ethnicity</a> and <a href="/facts/Crime/BfoRzbL3">crime</a>. She has shown that police officers tend to identify black faces as criminals more often than white faces,<a class="footnote-ref" id="fnref:140" href="#fn:140">140</a> that criminal defendants with more stereotypically black features were more likely to receive harsher sentences including the death penalty,<a class="footnote-ref" id="fnref:141" href="#fn:141">141</a> and that when people think of black juvenile offenders they tend to perceive all juvenile offenders as more adult, resulting in higher levels of punishment.<a class="footnote-ref" id="fnref:142" href="#fn:142">142</a>
Eberhardt received a <a href="/facts/MacArthur_Foundation_Fellowship/2nF5hIJh">MacArthur Foundation Fellowship</a> in 2014 for her research on the effects of racial bias and their societal consequences.<a class="footnote-ref" id="fnref:143" href="#fn:143">143</a> She is a co-founder of Social Psychological Answers to Real-world Questions (SPARQ), a translational research organization that applies psychological findings to address social issues.<a class="footnote-ref" id="fnref:144" href="#fn:144">144</a>

<h2 id="academic-journals">Academic journals</h2>

<ul><li><a href="/facts/Group_Processes_%2526_Intergroup_Relations/CvFhU3rJ">Group Processes & Intergroup Relations</a></li>
<li><a href="/facts/Journal_of_Personality_and_Social_Psychology/hAsExTRx">Journal of Personality and Social Psychology</a></li>
<li><a href="/facts/Journal_of_Experimental_Social_Psychology/2HqT9joL">Journal of Experimental Social Psychology</a></li>
<li><a href="/facts/Personality_and_Social_Psychology_Review/5J7KIRrX">Personality and Social Psychology Review</a></li>
<li><a href="/facts/Personality_and_Social_Psychology_Bulletin/sKjn11Fl">Personality and Social Psychology Bulletin</a></li>
<li><a href="/facts/Group_Dynamics%3a_Theory%2c_Research%2c_and_Practice/T3W4CpmK">Group Dynamics: Theory, Research, and Practice</a></li>
<li><a href="/facts/European_Journal_of_Social_Psychology/FnW1Sb6P">European Journal of Social Psychology</a></li>
<li><a href="/facts/British_Journal_of_Social_Psychology/hVJoIF4G">British Journal of Social Psychology</a></li></ul>
<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/In-group_and_out-group/xvBdRPTW">In-group and out-group</a></li>
<li><a href="/facts/Intergroup_bias/9dkeBNIk">Intergroup bias</a></li>
<li><a href="/facts/Intergroup_dialogue/46SdPVpk">Intergroup dialogue</a></li>
<li><a href="/facts/Social_norms/Qu2jGBz3">Social norms</a></li>
<li><a href="/facts/Social_projection/UEgprVjc">Social projection</a></li>
<li><a href="/facts/Psychology_of_social_class/NQh4jgLl">Psychology of social class</a></li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="http://www.rcgd.isr.umich.edu/">Research Center for Group Dynamics (RCGD) at the University of Michigan</a> (formerly at MIT)</li>
<li><a href="https://law.stanford.edu/stanford-center-on-international-conflict-and-negotiation-scicn/">Stanford Center on International Conflict and Negotiation (SCICN)</a></li>
<li><a href="https://sparq.stanford.edu/">Social Psychological Answers to Real-World Questions (SPARQ)</a></li>
<li><a href="https://www.spssi.org/index.cfm?fuseaction=page.viewpage&pageid=715">The Gordon Allport Intergroup Relations Prize – The Society for the Psychological Study of Social Issues</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1">"Intergroup Relations". International Encyclopedia of the Social Sciences. 2008. Retrieved 2018-01-07. <a href="http://www.encyclopedia.com/social-sciences/applied-and-social-sciences-magazines/intergroup-relations" target="_blank">http://www.encyclopedia.com/social-sciences/applied-and-social-sciences-magazines/intergroup-relations</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
<li id="fn:2">Kramer, Roderick M.; Schaffer, Jennifer (2014). "Intergroup Relations". Wiley Encyclopedia of Management. Wiley-Blackwell. pp. 1–3. doi:10.1002/9781118785317.weom110172. ISBN 9781118785317. <a href="9781118785317" target="_blank">9781118785317</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></li>
<li id="fn:3">"Intergroup relations". The Blackwell Encyclopedia of Management. Retrieved 2018-01-07. <a href="http://www.blackwellreference.com/public/tocnode?id=g9780631233176_chunk_g978063123536113_ss2-18" target="_blank">http://www.blackwellreference.com/public/tocnode?id=g9780631233176_chunk_g978063123536113_ss2-18</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">M., Kassin, Saul (2011). Social psychology. Fein, Steven., Markus, Hazel Rose. (8th ed.). Belmont, CA: Cengage Wadsworth. ISBN 9780495812401. OCLC 637074045.{{cite book}}: CS1 maint: multiple names: authors list (link) <a href="9780495812401" target="_blank">9780495812401</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
<li id="fn:5">Aristotle's Politics : critical essays. Kraut, Richard, 1944-, Skultety, Steven. Lanham: Rowman & Littlefield Publishers. 2005. ISBN 978-0742534230. OCLC 59879503.{{cite book}}: CS1 maint: others (link) <a href="978-0742534230" target="_blank">978-0742534230</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></li>
<li id="fn:6">Allport, G. W (1985). "The historical background of social psychology". In Lindzey, G; Aronson, E. The Handbook of Social Psychology. New York: McGraw Hill.p.5 <a href="#fnref:6" class="footnote-back-ref">↩</a></li>
<li id="fn:7">Crowds in the 21st century : perspectives from contemporary social science. Drury, John., Stott, Clifford John T. Abingdon, Oxfordshire. 8 June 2015. ISBN 978-1138922914. OCLC 925485880.{{cite book}}: CS1 maint: location missing publisher (link) CS1 maint: others (link) <a href="978-1138922914" target="_blank">978-1138922914</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></li>
<li id="fn:8">Crowds in the 21st century : perspectives from contemporary social science. Drury, John., Stott, Clifford John T. Abingdon, Oxfordshire. 8 June 2015. ISBN 978-1138922914. OCLC 925485880.{{cite book}}: CS1 maint: location missing publisher (link) CS1 maint: others (link) <a href="978-1138922914" target="_blank">978-1138922914</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></li>
<li id="fn:9">Allport, G. W (1985). "The historical background of social psychology". In Lindzey, G; Aronson, E. The Handbook of Social Psychology. New York: McGraw Hill.p.5 <a href="#fnref:9" class="footnote-back-ref">↩</a></li>
<li id="fn:10">Allport, G. W (1985). "The historical background of social psychology". In Lindzey, G; Aronson, E. The Handbook of Social Psychology. New York: McGraw Hill.p.5 <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
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</ol>

Intergroup relations open-in-new

Intergroup relations