98%
921
2 minutes
20
Segregation perpetuates social inequalities and undermines social cohesion. It can already emerge if individuals act upon weak preferences to associate with similar others. Yet, little remains known about how such ingroup preferences compare across social settings and different identity dimensions. To address this gap and to isolate ingroup preferences from other drivers of segregation, three large-scale, preregistered conjoint experiments on choices of neighborhoods and civic organizations were conducted ( = 2,733, = 2,743, = 2,707). The results reveal powerful ingroup preferences in both settings and across all studied dimensions (age, ethnicity, education). These preferences are strongest among individuals with little real-life exposure to outgroups and do not depend on the expected intensity of contact. As an exception, lower-educated individuals display no ingroup preferences along educational lines. Altogether, the results highlight that ingroup preferences are pervasive, can pose a critical obstacle to intergroup contact, and should thus be carefully considered in desegregation efforts.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12403059 | PMC |
http://dx.doi.org/10.1093/pnasnexus/pgaf256 | DOI Listing |
PNAS Nexus
September 2025
Department of Sociology, Radboud University Nijmegen, Thomas van Aquinostraat 4, 6525 GD Nijmegen, the Netherlands.
Segregation perpetuates social inequalities and undermines social cohesion. It can already emerge if individuals act upon weak preferences to associate with similar others. Yet, little remains known about how such ingroup preferences compare across social settings and different identity dimensions.
View Article and Find Full Text PDFSci Rep
August 2025
Institut des Sciences Cognitives, UMR5229 CNRS, 67 Boulevard Pinel, Bron, 69500, France.
When sharing a space with others, many species including humans evolved a compromise regulating occupancy influenced by social determinants. For example, students in a classroom tend to sit close to their friends, keeping the same spots across days, revealing the social structure in the classroom. This place preference suggests that factors such as social hierarchy and affiliation can shape space utilization, contrasting with random walk models of agents moving at random in any given direction.
View Article and Find Full Text PDFAnimals (Basel)
July 2025
State Key Laboratory of Animal Biodiversity Conservation and Integrated Pest Management, Institute of Zoology Chinese Academy of Sciences, Beijing 100101, China.
Halictidae, as a major pollinator family in bees, has significant ecological value. However, the insufficient molecular data for this group has limited our understanding of the evolutionary history of this group. Herein, we newly sequenced and assembled four mitogenomes of Halictidae, including three species of Nomiinae and one species of Rophitinae.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
August 2025
Institute for Globally Distributed Open Research and Education (IGDORE), Göteborg 413 90, Sweden.
Whether and to what degree culture modifies cognition has been an area of research often limited by possibilities to gather relevant data across societies. In this project, we leverage webcam-based eye-tracking to study cultural variations of cognitive processes underlying in-group favoritism. Participants (n = 1850, k = 20) are assigned to an in-group based on a color perception task, complete a group reinforcement stage, and then make decisions to allocate points between themselves and random matched players in a repeated decomposed dictator game, facing either an in- or an out-group member.
View Article and Find Full Text PDFJ Exp Child Psychol
December 2025
Department of Psychology and Neuroscience, Duke University, United States.
Children often attend to social group differences when making decisions. Here, we investigated group preferences among Hong Kong children: 115 Chinese children (M = 67.56 months, SD = 10.
View Article and Find Full Text PDF