Modification of social dominance in social networks by selective adjustment of interpersonal weights

According to the DeGroot-Friedkin model of a social network, an individual's social power evolves as the network discusses individual opinions over a sequence of issues. Under mild assumptions on the connectivity of the network, the social power of every individual converges to a constant nonnegative value as the number of issues discussed increases. If the network has a special topology, namely the “star topology”, then all social power accumulates with the individual at the centre of the star. This paper studies the strategic introduction of new individuals and/or interpersonal relationships into a social network with the star topology so as to reduce the social power of the centre individual. In fact, several strategies are proposed. For each strategy, we derive necessary and sufficient conditions on the strength of the new interpersonal relationships, based on local information, which ensures that the centre individual no longer has the greatest social power within the social network. Interpretations of these conditions reveal that the strategies are remarkably intuitive and that certain strategies are favourable compared to others, all of which is sociologically expected.u. The work of Ye, Anderson, and Yu was supported by the Australian Research Council (ARC) under grants DP-130103610 and DP-160104500, by the National Natural Science Foundation of China (grant 61375072), and by Data61-CSIRO. Ye was supported by an Australian Government Research Training Program (RTP) Scholarship. The work of Liu and Bas¸ar was supported in part by Office of Naval Research (ONR) MURI Grant N00014-16-1-2710, and in part by NSF under grant CCF 11-11342

Opinion Dynamics and the Evolution of Social Power in Social Networks

A fundamental aspect of society is the exchange and discussion of opinions between individuals, occurring in mediums and situations as varied as company boardrooms, elementary school classrooms and online social media. This thesis studies several mathematical models of how an individual’s opinion(s) evolves via interaction with others in a social network, developed to reflect and capture different socio-psychological processes that occur during the interactions. In the first part, and inspired by Solomon E. Asch’s seminal experiments on conformity, a novel discrete-time model of opinion dynamics is proposed, with each individual having both an expressed and a private opinion on the same topic. Crucially, an individual’s expressed opinion is altered from the individual’s private opinion due to pressures to conform to the majority opinion of the social network. Exponential convergence of the opinion dynamical system to a unique configuration is established for general networks. Several conclusions are established, including how differences between an individual’s expressed and private opinions arise, and how to estimate disagreement among the private opinions at equilibrium. Asch’s experiments are revisited and re-examined, and then it is shown that a few extremists can create “pluralistic ignorance”, where people believe there is majority support for a position but in fact the position is privately rejected by the majority of individuals! The second part builds on the recently proposed discrete-time DeGroot–Friedkin model, which describes the evolution of an individual’s self-confidence (termed social power) in his/her opinion over the discussion of a sequence of issues. Using nonlinear contraction analysis, exponential convergence to a unique equilibrium is established for networks with constant topology. Networks with issue-varying topology (which remain constant for any given issue) are then studied; exponential convergence to a unique limiting trajectory is established. In a social context, this means that each individual forgets his/her initial social power exponentially fast; in the limit, his/her social power for a given issue depends only on the previously occurring sequence of dynamic topology. Two further related works are considered; a network modification problem, and a different convergence proof based on Lefschetz Fixed Point Theory. In the final part, a continuous-time model is proposed to capture simultaneous discussion of logically interdependent topics; the interdependence is captured by a “logic matrix”. When no individual remains attached to his/her initial opinion, a necessary and sufficient condition for the network to reach a consensus of opinions is provided. This condition depends on the interplay between the network interactions and the logic matrix; if the network interactions are too strong when compared to the logical couplings, instability can result. Last, when some individuals remain attached to their initial opinions, sufficient conditions are given for opinions to converge to a state of persistent disagreement

Human neuromaturation, juvenile extreme energy liability, and adult cognition/cooperation

Human childhood and adolescence is the period in which adult cognitive competences (including those that create the unique cooperativeness of humans) are acquired. It is also a period when neural development puts a juvenile’s survival at risk due to the high vulnerability of their brain to energy shortage. The brain of a 4 year-old human uses ≈50% of its total energy expenditure (TEE) (cf. adult ≈12%). This brain expensiveness is due to (1) the brain making up ≈6% of a 4 year-old body compared to 2% in an adult, and (2) increased energy metabolism that is ≈100% greater in the gray matter of a child than in an adult (a result of the extra costs of synaptic neuromaturation). The high absolute number of neurons in the human brain requires as part of learning a prolonged neurodevelopment. This refines inter- and intraarea neural networks so they become structured with economical “small world” connectivity attributes (such as hub organization and high cross-brain differentiation/integration). Once acquired, this connectivity enables highly complex adult cognitive capacities. Humans evolved as hunter-gatherers. Contemporary hunter-gatherers (and it is also likely Middle Paleolithic ones) pool high energy foods in an egalitarian manner that reliably supported mothers and juveniles with high energy intake. This type of sharing unique to humans protects against energy shortage happening to the immature brain. This cooperation that protects neuromaturation arises from adults having the capacity to communicate and evaluate social reputation, cognitive skills that exist as a result of extended neuromaturation. Human biology is therefore characterized by a presently overlooked bioenergetic-cognition loop (called here the “HEBE ring”) by which extended neuromaturation creates the cooperative abilities in adults that support juveniles through the potentially vulnerable period of the neurodevelopment needed to become such adults

Analysis of a Voting Method for Ranking Network Centrality Measures on a Node-aligned Multiplex Network

Identifying relevant actors using information gleaned from multiple networks is a key goal within the context of human aspects of military operations. The application of a voting theory methodology for determining nodes of critical importance—in ranked order of importance—for a node-aligned multiplex network is demonstrated. Both statistical and qualitative analyses on the differences of ranking outcomes under this methodology is provided. As a corollary, a multilayer network reduction algorithm is investigated within the context of the proposed ranking methodology. The application of the methodology detailed in this thesis will allow meaningful rankings of relevant actors to be produced on a multiplex network

The effect of personality, emotional intelligence and social network characteristics on sales performance: The mediating roles of market intelligence use, adaptive selling behaviour and improvisation

Today’s account management is complex. The market is extremely competitive, technology is making alternatives and low-distribution methods possible, product lifecycles are accelerating, and customers are becoming less loyal and more sophisticated while at the same time, becoming more demanding. A key challenge facing firms is to determine how to deploy highly effective account managers in order to perform in this complex environment. In this dissertation, I tested whether account manager (1) personality traits, (2) social network characteristics, and (3) emotional intelligence affected their sales performance. I then tested whether these three independent variables affected sales performance through various mediating variables including: (1) market intelligence use, (2) improvisation, and (3) adaptive selling behaviour. Finally, I tested the model by comparing between the Muslim and non-Muslim account managers due to the understanding that Islamic values influence the personality and behaviour of its followers. The research setting involved Muslim and non-Muslim account managers in Malaysia who managed sales of financial products such as shares, bonds, unit trusts, foreign exchange, and futures markets. A combination of mail and in-person survey was used to collect the data. A pilot test was conducted prior to final survey administration. Eighteen randomly selected account managers participated in the pilot test. Results and observations from the pilot test were used to finalise the survey. The finalised questionnaire was sent to 2,122 account managers drawn randomly from the 29 registered finance companies, stock brokers, and banks in Malaysia. Four hundred ninety four usable questionnaires were returned yielding a 23.3 percent response rate. Of the 494 replies, 280 were from Muslim account managers while the remaining 214 were from non-Muslim account managers. Data was analysed using Structural Equation Modeling (SEM). The Goodness of Fit Index GFI, Comparative Fit Index CFI, and Root Mean Square Error of Approximation RMSEA were used as model fitness indicators. The missing data was analysed using Maximum Likelihood (ML). Overall, the results of the data illustrated strong support for the conceptual model. Market intelligence use and improvisation was found to mediate the relationship between the independent variables and the dependent variable. More specifically, market intelligence use and improvisation were observed to mediate the relationship between openness to experience and sales performance, conscientiousness and sales performance, and network size and sales performance. Adaptive selling behaviour was found to mediate the relationship between emotional intelligence and sales performance. Finally, no significant statistical differences were observed between Muslim and non-Muslim managers. The results of this study contribute to sales management literature by understanding the role of mediators in the personality trait-sales performance relationship, social network characteristics-sales performance relationship, and emotional intelligence-sales performance relationship. Consequently, these findings indicate several managerial implications for recruitment, training, work practices, internal and relationship marketing, and policies at the workplace

Social Dominance Orientation and Emotion Regulation: A Parallel Multiple Mediator Model of Instigated Incivility Moderated By Workgroup Civility Climate

While most of the existing research on the topic of workplace incivility has focused upon its consequences on employee and organizational well-being, researchers are recognizing the need for research on predictors, mediators, and moderators of uncivil workplace behavior. The current study contributes to this new wave of workplace incivility research by emphasizing the links among variables not previously explored in incivility research. This nonexperimental correlational study (N = 1027) developed and tested a parallel multiple mediator model of instigated incivility. The model examined the mediation of the emotion regulation strategies – cognitive reappraisal and expressive suppression – on the relation of two types of social dominance orientation – intergroup dominance (SDO-D) and intergroup antiegalitarianism (SDO-E) – on the outcome of instigated incivility, and tested the moderating effects of workgroup civility climate on the paths of the proposed model. An Internet-based self-report survey battery was administered to a sample drawn from Amazon’s Mechanical Turk worker population. Hypotheses were tested though structural equation modeling analytic procedures. Findings suggest that intergroup dominance (SDO-D) increases instigated incivility and the relationship is not moderated by workgroup civility climate norms. In contrast, intergroup antiegalitarianism (SDO-E) decreases instigated incivility. Further, this study found that SDO-D had an indirect effect on instigated incivility through the emotion regulation strategy of expressive suppression. Additional findings suggest that the emotion regulation strategy of cognitive reappraisal has the potential to reduce uncivil workplace behavior. Future research was proposed to test the model examined in this study in different cultural settings, with additional mediators and moderators, and longitudinally. The practical findings suggest that HRD practitioners may find emotion regulation and civility trainings useful to reduce the likelihood of uncivil workplace behavior

Shell nouns : in a systemic functional linguistics perspective

Tese de doutoramento, Linguística (Análise do Discurso), Universidade de Lisboa, Faculdade de Letras, 2015Shell nouns in a Systemic Functional Linguistics perspective. The aim of this thesis is to develop an account of shell nouns (Schmid, 2000) in a Systemic Functional Linguistics (SFL) perspective. Using a parallel corpus comprising five article submissions by Portuguese academics in the field of economics and five published articles on comparable topics, the ideational, interpersonal and textual functions of shell nouns are tagged at the strata of the lexicogrammar and discourse semantics using Corpus Tool version 2.7.4 (O’Donnell, 2008). The systems networks used to tag the corpus are grounded in SFL theory. The analysis shows that shell nouns constitute an important systemic resource for the writers of research articles, who need to build an argument, positioning themselves and their study to convince the discourse community that their paper makes a contribution to knowledge in their disciplinary field. They enable a text to unfold by compacting information realised as a clause or more elsewhere in the text. Thus they can help scaffold a text through hyper-Themes, hyper-News and internal conjunction. At the stratum of the lexicogrammar, anaphorically referring nominal groups with a shell noun as Head often compose Theme, where they constitute a shared point of departure for the clause. In a decoding relational clause whose Process is realised by a verb such as reveal, confirm, or suggest, an anaphorically referring shell noun that construes Token helps to explicitly build the writer’s argument. Shell nouns that construe the field of research, such as results and findings are common in this function. Mental, linguistic and factual shell nouns contribute to construing dialogic position, and coupling between interpersonal systems and textual systems enables the writer to align the reader with certain positions and disalign with others. Although most shell nouns are not field specific, because they can project a figure that instantiates an entity, they contribute to construing field, for example instantiating entities as the object of study of the empirical research. The capacity of shell nouns to function as described above derives from their status as semiotic abstractions, which can refer to text as fact or report and are grammatical metaphors. They can be seen as lying at the intersection of modality and the logico-semantic relations of projection and expansion, brought into being by the semogenic process of nominalisation. The writers of the published articles and article submissions are found to use shell nouns in all of the functions above, but there are differences in the relative shares of the functions, which may affect reader reactions to the text

A study of expatriate managers' adaptation, learning, knowledge acquisition, and personal development in multi-national companies in China

This research examines how Western expatriate managers adapt, learn, acquire tacit knowledge, and develop when working in China. The research draws on literature associated with expatriate studies, experiential learning theory, and knowledge acquisition in order to develop an expatriate learning process model. Following on from this, the study then examines expatriate learning outcomes from four perspectives: learning style transition, adaptive flexibility, global mindsets, and managerial tacit knowledge. Moreover, our model positions learning style as a mediator that affects the likelihood that expatriate managers will actively engage in their international assignment experiential learning, which in turn leads to global manager development. In particular, the study adopts a pseudo longitudinal research method that examines Western expatriate managers with different lengths of assignment tenure to better understand how expatriates learn and develop over time. Finally, the study investigates how Western expatriate managers with substantial work experience in China differ from host Chinese managers in terms of learning styles and levels of accumulated managerial tacit knowledge to provide deeper insights into expatriate learning.Data were collected in Western MNCs’ subsidiaries in China. The survey includes self-administered questionnaires and semi-structured interviews. The target populations comprise Western expatriate managers and host Chinese managers. The research seeks to understand more fully the kinds of learning strategies successful expatriates adopt in order to quickly adapt to intercultural business contexts. The study also contributes to understanding of expatriates’ learning outcomes from international assignments leading to recommendations for more effective expatriate training prior to international assignments. The study also draws comparisons between Western expatriate managers with differing levels of work experience in China (upto 1 year; 1 - 3 years; 3 - 5 years; > 5yrs) and host Chinese managers to better understand temporal aspects of expatriate adjustment and expatriate learning during their international assignments