Noah E. Friedkin
YOU?
Author Swipe
View article: Modeling Human-AI Team Decision Making
Modeling Human-AI Team Decision Making Open
AI and humans bring complementary skills to group deliberations. Modeling this group decision making is especially challenging when the deliberations include an element of risk and an exploration-exploitation process of appraising the capa…
View article: Structural Balance and Interpersonal Appraisals Dynamics: Beyond All-to-All and Two-Faction Networks
Structural Balance and Interpersonal Appraisals Dynamics: Beyond All-to-All and Two-Faction Networks Open
Structural balance theory describes stable configurations of topologies of signed interpersonal appraisal networks. Existing models explaining the convergence of appraisal networks to structural balance either diverge in finite time, or co…
View article: The 1995-2018 global evolution of the network of amicable and hostile relations among nation-states
The 1995-2018 global evolution of the network of amicable and hostile relations among nation-states Open
There has been longstanding interest in the evolution of positive and negative relationships among countries. An interdisciplinary field of study, Structural Balance Theory, has developed on the dynamics of such appraisal systems. However,…
View article: Expertise and confidence explain how social influence evolves along intellective tasks
Expertise and confidence explain how social influence evolves along intellective tasks Open
Discovering the antecedents of individuals' influence in collaborative environments is an important, practical, and challenging problem. In this paper, we study interpersonal influence in small groups of individuals who collectively execut…
View article: Structural Balance via Gradient Flows Over Signed Graphs
Structural Balance via Gradient Flows Over Signed Graphs Open
Structural balance is a classic property of signed graphs satisfying Heider's seminal axioms. Mathematical sociologists have studied balance theory since its inception in the 1040s. Recent research has focused on the development of dynamic…
View article: The 1995-2018 Global Evolution of the Network of Amicable and Hostile Relations Among Nation-States
The 1995-2018 Global Evolution of the Network of Amicable and Hostile Relations Among Nation-States Open
We draw on the data collected by the Integrated Crisis Early Warning System on millions of international and regional public news stories, and this system's indicators of the orientation toward a specific nation-state. We construct the net…
View article: Generalized Markovian Quantity Distribution Systems: Social Science Applications
Generalized Markovian Quantity Distribution Systems: Social Science Applications Open
We propose a model of Markovian quantity flows on connected networks that relaxes several properties of the standard compartmental Markov process. The motivation of our generalization are social science applications of the standard model t…
View article: Multigroup connectivity structures and their implications
Multigroup connectivity structures and their implications Open
We investigate the implications of different forms of multigroup connectivity. Four multigroup connectivity modalities are considered: co-memberships, edge bundles, bridges, and liaison hierarchies. We propose generative models to generate…
View article: Positive contagion and the macrostructures of generalized balance
Positive contagion and the macrostructures of generalized balance Open
Balance theory has advanced with interdisciplinary contributions from social science, physical science, engineering, and mathematics. The common focus of attention is social networks in which every individual has either a positive or negat…
View article: Social power evolution in influence networks with stubborn individuals
Social power evolution in influence networks with stubborn individuals Open
This paper studies the evolution of social power in influence networks with stubborn individuals. Based on the Friedkin-Johnsen opinion dynamics and the reflected appraisal mechanism, two models are proposed over issue sequences and over a…
View article: Perspectives on Network Systems and Mathematical Sociology
Perspectives on Network Systems and Mathematical Sociology Open
This chapter reviews selected topics in network systems and mathematical sociology. We first review classic results on Perron–Frobenius and algebraic graph theory. We then focus on mathematical sociology and describe models of opinion dyna…
View article: Opinion Dynamics and Social Power Evolution: A Single-Timescale Model
Opinion Dynamics and Social Power Evolution: A Single-Timescale Model Open
This paper studies the evolution of self-appraisal and social power, for a group of individuals who discuss and form opinions. We consider a modification of the recently proposed DeGroot-Friedkin (DF) model, in which the opinion formation …
View article: Dynamic Social Balance and Convergent Appraisals via Homophily and Influence Mechanisms
Dynamic Social Balance and Convergent Appraisals via Homophily and Influence Mechanisms Open
Social balance theory describes allowable and forbidden configurations of the topologies of signed directed social appraisal networks. In this paper, we propose two discrete-time dynamical systems that explain how an appraisal network \tex…
View article: How truth wins in opinion dynamics along issue sequences
How truth wins in opinion dynamics along issue sequences Open
Significance Investigations of the conditions of truth wins in social groups present mixed findings and have not included a network science modeling of the opinion dynamics that alter individuals’ positions. This paper presents evidence th…
View article: Network science on belief system dynamics under logic constraints
Network science on belief system dynamics under logic constraints Open
Belief system dynamics People tend to structure their beliefs in a way that appears consistent to them. But how do some beliefs within groups persist in the face of social pressure, whereas others change and, by changing, influence a casca…
View article: Dynamic Models of Appraisal Networks Explaining Collective Learning
Dynamic Models of Appraisal Networks Explaining Collective Learning Open
This paper proposes models of learning process in teams of individuals who collectively execute a sequence of tasks and whose actions are determined by individual skill levels and networks of interpersonal appraisals and influence. The clo…
View article: Novel Multidimensional Models of Opinion Dynamics in Social Networks
Novel Multidimensional Models of Opinion Dynamics in Social Networks Open
Unlike many complex networks studied in the literature, social networks rarely exhibit unanimous behavior, or consensus. This requires a development of mathematical models that are sufficiently simple to be examined and capture, at the sam…
View article: A Theory of the Evolution of Social Power: Natural Trajectories of Interpersonal Influence Systems along Issue Sequences
A Theory of the Evolution of Social Power: Natural Trajectories of Interpersonal Influence Systems along Issue Sequences Open
This article reports new advancements in the theory of influence system evolution in small deliberative groups, and a novel set of empirical findings on such evolution. The theory elaborates the specification of the single-issue opinion dy…