Eugene Johnsen

About

Eugene Johnsen is an Emeritus Faculty member in the Department of Mathematics at the University of California, Santa Barbara. His specialization includes combinatorial mathematics, matrix theory, mathematical sociology, and social network theory. He is associated with the Department of Mathematics at UCSB, located in South Hall, Room 6607, and has an office hours schedule from Monday to Friday, 9-12 and 1-4. His contact information includes an email address (johnsen@math.ucsb.edu), a phone number (805-893-5808), and a fax number (805-893-2385). His work focuses on mathematical areas that intersect with social sciences, emphasizing the structural and theoretical aspects of social networks and combinatorial structures.

Research topics

• Mathematics
• Psychology
• Social psychology
• Combinatorics
• Computer science

Selected publications

• Social Influence Network Theory: A Sociological Examination of Small Group Dynamics

  2014-02-20 · 190 citations

  bookOpen accessSenior author

  Social influence network theory presents a mathematical formalization of the social process of attitude changes that unfolds in a social network of interpersonal influences. This book brings the theory to bear on lines of research in the domain of small group dynamics concerned with changes of group members' positions on an issue, including the formation of consensus and of settled disagreement, via endogenous interpersonal influences, in which group members are responding to the displayed posit…

  PublisherOA PDFDOI

• Status, networks, and opinions: A modular integration of two theories

  Advances in group processes · 2010-01-01 · 18 citations

  book-chapterSenior author

  This chapter focuses on two theories in the landscape of research on social influence – status characteristics theory and social influence network theory – between which heretofore there has been little communication. We advance these two approaches by dovetailing them in a “modular integration” that retains the assumptions of each theory and extends their scope of application. Here, we concentrate on the extension of status characteristics theory to multiactor task-oriented groups and develop n…

  PublisherDOI

• Status, Networks, and Opinion Change: An Experimental Investigation

  Social Psychology Quarterly · 2017-04-27 · 10 citations

  articleSenior author

  This study evaluates two prominent sociological theories of interpersonal influence: status characteristics theory and social influence network theory. In application to status settings, we test social influence network theory and its established measurement model as well as a recent “modular integration” that operationalizes social influence network theory’s central constructs by incorporating assumptions from status characteristics theory. The two formulations are systematically examined withi…

  PublisherDOI

• Social Comparison Theory

  Cambridge University Press eBooks · 2011-04-18 · 6 citations

  book-chapterSenior author

  We have seen that the smallest group – the dyad – presents nontrivial features of the influence process when both members of the dyad are influencing each other. The special case of a dyad with a source, who holds a fixed position on an issue, and a target, who may be influenced by the source, is a simple special case within a larger theoretical domain of possible influence networks that may occur in the dyad. When a group is enlarged by one member – the triad – the theoretical domain of possibl…

  PublisherDOI

• Models of Group Decision-Making

  Cambridge University Press eBooks · 2011-04-18 · 3 citations

  book-chapterSenior author

  A group decision occurs when group members select or settle upon one option from a set of alternatives and collectively consider that option to be the choice of the group (Brandstatter, Davis, and Stocker-Kreichgauer 1982; Castellan 1993; Levine and Moreland 1990, 1998; Moscovici and Doise 1994; Witte and Davis 1996). Social influence network theory has an important bearing on how groups make decisions, because it presents an account of how interpersonal influences produce the agreements that ar…

  PublisherDOI

Frequent coauthors

• Noah E. Friedkin

  27 shared

• Peter D. Killworth

  National Oceanography Centre

  15 shared

• Gene A. Shelley

  Centers for Disease Control and Prevention

  14 shared

• Christopher McCarty

  University of Florida

  14 shared

• H. Russell Bernard

  Arizona State University

  14 shared

• Thomas Storer

  5 shared

• Adil Yaqub

  4 shared

• David L. Outcalt

  General Electric (United States)

  4 shared

Labs

• WeBWorKPI

Similar researchers at University of California, Santa Barbara

• Linda Petzoldh-68
• Igor Mezich-60
• Zheng Liuh-59