The research explored the frequency of politically diverse friendships—that is, those characterized by dissimilar political attitudes—and their association with political outgroup attitudes and friendship quality. In two studies, 971 pairs of adult friends in the United States reported their political attitudes and affiliation, discussion of controversial political issues, comfort with political disagreement (CPD), friendship quality and attitudes toward political groups. Friendships between Democrats and Republicans were rare and the degree of political attitude dissimilarity within pairs was generally low. Multilevel models estimated the association that CPD and political attitude dissimilarity within pairs each have with political outgroup attitudes and friendship quality. Political attitude dissimilarity was associated with lower prejudice toward political outgroups, but also lower friendship quality. CPD was weakly associated with higher friendship quality.
AboudF.MendelsonM.PurdyK. (2003). Cross-race peer relations and friendship quality. International Journal of Behavioral Development, 27(2), 165–173.
2.
AllportG. (1954). The nature of prejudice. Addison-Wesley.
3.
AragoniH. K.StanleyS. M.Smith-AcuñaS.RhoadesG. K. (2021). Religiosity and relationship quality in dating relationships. Couple and Family Psychology: Research and Practice. https://doi.org/10.1037/cfp0000177
4.
BahnsA. J. (2019). Preference, opportunity, and choice: A multilevel analysis of diverse friendship formation. Group Processes and Intergroup Relations, 22(2), 233–252. https://doi.org/10.1177/1368430217725390
BahnsA. J.CrandallC. S.GillathO.PreacherK. J. (2017). Similarity in relationships as niche construction: Choice, stability, and influence within dyads in a free choice environment. Journal of Personality and Social Psychology, 112(2), 329–355. https://doi.org/10.1037/pspp0000088
7.
BruchmannK.BakerS. G.AdisuM.ZassoS. A. (2023). You’re red, I’m blue, so I don’t like you: The political dissimilarity-disliking effect. Politics, Groups, and Identities, 1–18. https://doi.org/10.1080/21565503.2023.2224760
8.
BruchmannK.Koopmann-HolmB.SchererA. (2018). Seeing beyond political affiliations: The mediating role of perceived moral foundations on the partisan similarity-liking effect. PLOS ONE, 13(8). https://doi.org/10.1371/journal.pone.0202101
9.
BuligaE.MacInnisC. C.HodsonG.BiamonteJ. (2021). Friendship and romance across the U.S. political divide: Hindrance or help for outgroup political attitudes?Journal of Applied Social Psychology. https://doi.org/10.1111/jasp.12736
10.
ByrneD. (1971). The attraction paradigm. Academic Press.
11.
ByrneD.BlaylockB. (1963). Similarity and assumed similarity of attitudes between husbands and wives. Journal of Abnormal and Social Psychology, 67(6), 636.
12.
ChambersJ. R.BaronR. S.InmanM. L. (2006). Misperceptions in intergroup conflict: Disagreeing about what we disagree about. Psychological Science, 17(1), 38–45. https://doi.org/10.1111/j.1467-9280.2005.01662.x
13.
ChambersJ. R.MelnykD. (2006). Why do I hate thee? Conflict misperceptions and intergroup mistrust. Personality and Social Psychology Bulletin, 32(10), 1295–1311. https://doi.org/10.1177/0146167206289979
14.
ChenF. F.KenrickD. T. (2002). Repulsion or attraction? Group membership and assumed attitude similarity. Journal of Personality and Social Psychology, 83(1), 111–125. https://doi.org/10.1037/0022-3514.83.1.111
15.
CollissonB.HowellJ. L. (2014). The liking-similarity effect: Perceptions of similarity as a function of liking. Journal of Social Psychology, 154(5), 384–400.
16.
CramerD. (2004). Effect of the destructive disagreement belief on relationship satisfaction with a romantic partner or closest friend. Psychology and Psychotherapy: Theory, Research and Practice, 77(1), 121–133. https://doi.org/10.1348/147608304322874290
17.
CrandallC. S.EshlemanA.O’BrienL. O. (2002). Social norms and the expression and suppression of prejudice: The struggle for internalization. Journal of Personality and Social Psychology, 82, 359–378. https://doi.org/10.1037//0022-3514.82.3.359
18.
DaviesK.TroppL. R.AronA.PettigrewT. F.WrightS. C. (2011). Cross-group friendships and intergroup attitudes: A meta-analytic review. Personality and Social Psychology Review, 15(4), 332–351. https://doi.org/10.1177/1088868311411103
19.
de JongJ. F. (2024). Cross-partisan discussions reduced political polarization between UK voters, but less so when they disagreed. Communications Psychology, 2(1), 5. https://doi.org/10.1038/s44271-023-00051-8
20.
DensonN.ChangM. J. (2009). Racial diversity matters: The impact of diversity-related student engagement and institutional context. American Educational Research Journal, 46(2), 322–353. https://doi.org/10.3102/0002831208323278
21.
DrigotasS. M. (1993). Similarity revisited: A comparison of similarity-attraction versus dissimilarity-repulsion. British Journal of Social Psychology, 32(4), 365–377. https://doi.org/10.1111/j.2044-8309.1993.tb01006.x
22.
FangmeierT. L.StanleyS. M.KnoppK.RhoadesG. K. (2020). Political party identification and romantic relationship quality. Couple and Family Psychology: Research and Practice, 9(3), 167–180. https://doi.org/10.1037/cfp0000141
23.
GleasonK. A.Jensen-CampbellL. A.IckesW. (2009). The role of empathic accuracy in adolscents' peer relations and adjustment. Personality and Social Psychology Bulletin, 35(8), 997–1011. https://dx.doi.org/10.1177/0146167209336605
24.
GoelS.MasonW.WattsD. J. (2010). Real and perceived attitude agreement in social networks. Journal of Personality and Social Psychology, 99(4), 611–621. https://doi.org/10.1037/a0020697
25.
GrayJ. S.CoonsJ. V. (2017). Trait and goal similarity and discrepancy in romantic couples. Personality and Individual Differences, 107, 1–5. https://doi.org/10.1016/j.paid.2016.11.024
26.
HewstoneM.CairnsE.VociA.HambergerJ.NiensU. (2006). Intergroup contact, forgiveness, and experience of “The Troubles” in Northern Ireland. Journal of Social Issues, 62(1), 99–120. https://doi.org/10.1111/j.1540-4560.2006.00441.x
27.
IyengarS.LelkesY.LevenduskyM.MalhotraN.WestwoodS. J. (2019). The origins and consequences of affective polarization in the United States. Annual Review of Political Science, 22, 129–146. https://doi.org/10.1146/annurev-polisci-051117-073034
28.
JostJ. T.GlaserJ.KruglanskiA. W.SullowayF. J. (2003). Political conservatism as motivated social cognition. Psychological Bulletin, 129, 339–375. https://doi.org/10.1037/0033-2909.129.3.339
29.
KawabataY.CrickN. R. (2011). The significance of cross-racial/ethnic friendships: Associations with peer victimization, peer support, sociometric status, and classroom diversity. Developmental Psychology, 47(6), 1763–1775. https://doi.org/10.1037/a0025399
LeikasS.IlmarinenV.-J.VerkasaloM.VartiainenH.-L.LönnqvistJ.-E. (2018). Relationship satisfaction and similarity of personality traits, personal values, and attitudes. Personality and Individual Differences, 123, 191–198. https://doi.org/10.1016/j.paid.2017.11.024
32.
LopesG. S.ShackelfordT. K.BussD. M.AbedM. G. (2020). Individual differences and disagreement in romantic relationships [Article]. Personality & Individual Differences, 155, N.PAG–N.PAG. https://doi.org/10.1016/j.paid.2019.109735
33.
LuoS. (2009). Partner selection and relationship satisfaction in early dating couples: The role of couple similarity. Personality and Individual Differences, 47(2), 133–138.
34.
LuptonR. N.SinghS. P.ThorntonJ. R. (2015). The moderating impact of social networks on the relationships among core values, partisanship, and candidate evaluations. Political Psychology, 36(4), 399–414. https://doi.org/10.1111/pops.12102
35.
McPhersonM.Smith-LovinL.CookJ. M. (2001). Birds of a feather: Homophily in social networks. Annual Review of Sociology, 27, 415–444. https://doi.org/10.1146/annurev.soc.27.1.415
36.
MutzD. C. (2002a). The consequences of cross-cutting networks for political participation. American Journal of Political Science, 46(4), 838–855. https://www.jstor.org/stable/3088437
37.
MutzD. C. (2002b). Cross-cutting social networks: Testing democratic theory in practice. American Political Science Review, 96(1), 111–126.
38.
NeubaumG.CargninoM.WinterS.Dvir-GvirsmanS. (2021). ‘You’re still worth it’: The moral and relational context of politically motivated unfriending decisions in online networks. PLOS ONE, 16(1). https://doi.org/10.1371/journal.pone.0243049
39.
PoteatV. P.MereishE. H.LiuM. L.NamJ. S. (2011). Can friendships be bipartisan? The effects of political ideology on peer relationships. Group Processes and Intergroup Relations, 14(6), 819–834. https://doi.org/10.1177/1368430211401048
40.
RockenbachA. N.HudsonT. D. (2024). Transforming political divides: How student identities and campus contexts shape interpartisan friendships. AERA Open, 10, 23328584231222475. https://doi.org/10.1177/23328584231222475
41.
RosenbaumM. E. (1986). The repulsion hypothesis: On the nondevelopment of relationships. Journal of Personality and Social Psychology, 51(6), 1156–1166. https://doi.org/10.1037/0022-3514.51.6.1156
42.
SantoroE.BroockmanD. E. (2022). The promise and pitfalls of cross-partisan conversations for reducing affective polarization: Evidence from randomized experiments. Science Advances, 8(25), eabn5515. https://doi.org/10.1126/sciadv.abn5515
43.
SmeatonG.ByrneD.MurnenS. K. (1989). The repulsion hypothesis revisited: Similarity irrelevance or dissimilarity bias?Journal of Personality and Social Psychology, 56(1), 54–59. https://doi.org/10.1037/0022-3514.56.1.54
44.
SmithA. E. (2015). The diverse impacts of politically diverse networks: Party systems, political disagreement, and the timing of vote decisions. International Journal of Public Opinion Research, 27(4), 481–496. https://doi.org/10.1093/ijpor/edv018
45.
StringerM.IrwingP.GilesM.McClenahanC.WilsonR.HunterJ. A. (2009). Intergroup contact, friendship quality and political attitudes in integrated and segregated schools in Northern Ireland. British Journal of Educational Psychology, 79(2), 239–257. https://doi.org/10.1348/978185408X368878
46.
SumaktoyoN. G. (2021). Friends from across the aisle: The effects of partisan bonding, partisan bridging, and network disagreement on outparty attitudes and political engagement. Political Behavior, 43, 223–245. https://doi.org/10.1007/s11109-019-09552-x
47.
TregerS.MascialeJ. N. (2018). Domains of similarity and attraction in three types of relationships. Interpersona: An International Journal on Personal Relationships, 12(2), 254–266. https://doi.org/10.5964/ijpr.v12i2.321
48.
WilmerJ. B. (2022). Data visualization web apps (Version 2.0) [Web Apps]. ShowMyData. https://showmydata.org
49.
ZhangZ.YuanK.-H. (2018). Practical Statistical Power Analysis Using Webpower and R (Eds). Granger, IN: ISDSA Press.
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