TY - RPRT AV - none M1 - working_paper ID - eprints2120 TI - Understanding opinions. A cognitive and formal account UR - http://arxiv.org/abs/1106.4221 N2 - The study of opinions, their formation and change, is one of the defining topics addressed by social psychology, but in recent years other disciplines, as computer science and complexity, have addressed this challenge. Despite the flourishing of different models and theories in both fields, several key questions still remain unanswered. The aim of this paper is to challenge the current theories on opinion by putting forward a cognitively grounded model where opinions are described as specific mental representations whose main properties are put forward. A comparison with reputation will be also presented. KW - opinion dynamics; social influence; gossip; media; agenda-setting PB - ArXiv EP - 15 Y1 - 2011/// A1 - Giardini, Francesca A1 - Quattrociocchi, Walter A1 - Conte, Rosaria ER -