The Emergence and Stability of Groups in Social Networks

Stadtfeld, Christoph; Takács, Károly; Vörös, András

doi:10.1016/j.socnet.2019.10.008

Cited by 73 publications

(57 citation statements)

References 67 publications

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“…We first found all cliques of three species (1588 unique cliques) within our networks (see “ Methods ”). These triadic cliques are important to understand because their formation provides stability to the community structures existing between species 43 , 44 . Of these cliques: 113 were shared in at least 1 other network, 8 were shared across three networks, and only 1 ( Bacteroides caecimuris, Bacteroides fluxus, Bacteroides thetaiotaomicron ) was found in all networks.…”

Section: Resultsmentioning

confidence: 99%

Bacterial associations in the healthy human gut microbiome across populations

Loftus

Hassouneh

Yooseph

2021

Sci Rep

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In a microbial community, associations between constituent members play an important role in determining the overall structure and function of the community. The human gut microbiome is believed to play an integral role in host health and disease. To understand the nature of bacterial associations at the species level in healthy human gut microbiomes, we analyzed previously published collections of whole-genome shotgun sequence data, totaling over 1.6 Tbp, generated from 606 fecal samples obtained from four different healthy human populations. Using a Random Forest Classifier, we identified 202 signature bacterial species that were prevalent in these populations and whose relative abundances could be used to accurately distinguish between the populations. Bacterial association networks were constructed with these signature species using an approach based on the graphical lasso. Network analysis revealed conserved bacterial associations across populations and a dominance of positive associations over negative associations, with this dominance being driven by associations between species that are closely related either taxonomically or functionally. Bacterial species that form network modules, and species that constitute hubs and bottlenecks, were also identified. Functional analysis using protein families suggests that much of the taxonomic variation across human populations does not foment substantial functional or structural differences.

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Section: Resultsmentioning

confidence: 99%

Bacterial associations in the healthy human gut microbiome across populations

Loftus

Hassouneh

Yooseph

2021

Sci Rep

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“…In conclusion, despite these limitations, our study testifies to the fruitfulness of ABM for theory development, in particular to explore the consequences of artificial, experimental manipulations on social network dynamics (Raub, Buskens, & van Assen, 2011;Snijders & Steglich, 2015;Stadtfeld, 2018; see also examples by Anjos & Reagans, 2013;Stadtfeld et al, 2020). By manipulating variations of environmental configurations, computer simulation helps to observe aggregate consequences of micro-level processes while controlling for factors that empirical research cannot always fully isolate.…”

Section: Discussionmentioning

confidence: 81%

Solidarity in collaboration networks when everyone competes for the strongest partner: a stochastic actor-based simulation model

Bianchi

Flache

Squazzoni

2020

The Journal of Mathematical Sociology

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This article examines the emergence of solidarity from interactions between professionals competing for collaboration. Research on multiplex collaboration networks has shown that economic exchange can elicit solidarity when mediated by trust but did not consider the effect of competition. To fill this gap, we built an agent-based model that simulates the evolution of a multiplex network of collaboration, trust, and support expectations. Simulations show that while resource heterogeneity is key for collaboration, competition for attractive collaboration partners penalizes low-resource professionals, who are less connected and highly segregated. Heterogeneous resource distribution can trigger segregation because of preferential selection of resourceful peers and reciprocity. Interestingly, we also found that low-resource professionals can reduce their marginalization by building in-group mutual support expectations. ARTICLE HISTORY

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“…This is because group norms and identities may exist that prohibit group members from interacting and developing positive ties within the group. 4 According to the results of the present study, the partners were willing to engage in preparations for childbirth and parenthood. They wanted to gain information that was trustworthy.…”

Section: Discussionmentioning

confidence: 83%

How partners of pregnant women use their social networks when preparing for childbirth and parenthood: A qualitative study

Bäckström

Larsson

Thorstensson

2020

Nordic Journal of Nursing Research

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Social contextual circumstances have an influence on parental transition, and social support has been shown to facilitate the transition to parenthood, among other states. Further knowledge is, however, needed to explore how partners of pregnant women use their social networks during pregnancy. Therefore, the aim of this study was to explore how partners of pregnant women use their social networks when preparing for childbirth and parenting. Within this study, a social network is defined as social connections such as family, friends and significant others. In total, 14 partners (expectant fathers and co-mothers) were interviewed. Data were analysed using qualitative content analysis. EQUATOR Network guidelines and the COREQ checklist were applied. The analysis resulted in one theme of meaning: Partners use their social networks to receive social support, which facilitates understanding about how to prepare for childbirth and parenthood, which was described through three sub-themes. The results highlight the importance of social networks for partners when preparing for childbirth and parenthood. Professionals should aim to strengthen and extend partners’ social networks and access to social support. This could be done not only to support partners to attend parental classes, but also to participate socially as well as engage with other expectant parents within the classes.

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The Emergence and Stability of Groups in Social Networks

Cited by 73 publications

References 67 publications

Bacterial associations in the healthy human gut microbiome across populations

Bacterial associations in the healthy human gut microbiome across populations

Solidarity in collaboration networks when everyone competes for the strongest partner: a stochastic actor-based simulation model

How partners of pregnant women use their social networks when preparing for childbirth and parenthood: A qualitative study

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