title: Cortisol and testosterone associations with social network dynamics.
abstract: This study integrates behavioral endocrinology and network science to explore links between hormones and social network dynamics. Specifically, we examine how cortisol (C) and testosterone (T) are associated with creation of new friendships and maintenance of existing friendships. A collegiate marching band was used as a model system of a mixed-sex social organization. Participants (n=193; 53% female; M age=19.4years, 62.1% European-American) provided friendship nominations at time 1 and two months later at time 2. At time 1, participants donated saliva before and after rehearsal (later assayed for C and T). Stochastic actor-based models revealed that individuals with higher C levels were less likely to maintain their social relationships and more likely to create new friendships. In contrast, individuals with higher T levels were more likely to maintain friendships and less likely to create new relationships. Findings suggest that individual differences in C and T are associated with the initiation and maintenance of friendships and have several noteworthy theoretical implications.
authors.affiliation: Institute for Interdisciplinary Salivary Bioscience Research, Arizona State University, United States; Department of Psychology, Arizona State University, United States. Electronic address: Olga.Kornienko@asu.edu.
authors.forename: Olga
authors.initials: O
authors.lastname: Kornienko
authors.affiliation: School of Human Evolution and Social Change, Arizona State University, United States.
authors.forename: David R
authors.initials: DR
authors.lastname: Schaefer
authors.affiliation: School of Music, Loyola University New Orleans, United States.
authors.forename: Serena
authors.initials: S
authors.lastname: Weren
authors.affiliation: Herberger Institute for Design and the Arts, Arizona State University, United States.
authors.forename: Gary W
authors.initials: GW
authors.lastname: Hill
authors.affiliation: Institute for Interdisciplinary Salivary Bioscience Research, Arizona State University, United States; Department of Psychology, Arizona State University, United States; Johns Hopkins University School of Nursing, United States; Johns Hopkins University Bloomberg School of Public Health, United States; Johns Hopkins University School of Medicine, United States. Electronic address: Douglas.Granger@asu.edu.
authors.forename: Douglas A
authors.initials: DA
authors.lastname: Granger
mesh_terms: D000328:Adult; D005260:Female; D033062:Friends / Q000523:psychology; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D007206:Individuality; D007398:Interpersonal Relations; D008297:Male; D012919:Social Behavior; D012944:Social Support; D013739:Testosterone / Q000097:blood*; D055815:Young Adult
chemical_list: D013739:Testosterone; D006854:Hydrocortisone
keywords: Cortisol; Hormones; Social networks; Stochastic-actor based modeling; Testosterone