Serge Moscovici a apporté une contribution majeure aux processus de prise de décision en groupe en mettant en exergue dans ses recherches le processus de polarisation collective. Nous présenterons les conditions d’apparition de ce processus à partir de ses travaux et de ceux de ses collègues puis nous examinerons comment la polarisation peut conduire à des phénomènes de radicalisation et d’extrémisme politique ou religieux.

Bibliographie

Brenner, G. (2016). La pensée extrême. Comment des hommes ordinaires deviennent des fanatiques. Paris: P.U.F.

Brown, R. (2001). Group processes : Dynamics within and between groups. Oxford : Wiley-Blackwell.

Doise, W., Moscovici, S. (1984 ). Les décisions en groupe . In S. Moscovici, S. (Ed.) Psychologie sociale. Paris: P.U.F.

Festinger, L. (1954). A theory of social comparison processes. Human Relations, 7, 114-140.

Janis, I., L. (1972). Victims of groupthink. Boston: Houghton-Mifflin.

Khosrokhavar, F. (2014). Radicalisation. Paris: Maison des Sciences de l’Homme.

Kogan, N., Wallach, M.A. (1965). Risk taking as a function of the situation, the person and the group. In: G.Mandler, P. Mussen, N. Kogan, M.A. Wallach (Eds.) New directions in psychology, III. New York: Holt, Reinart and Winston.

Mackie, D.M. (1986). Social identification effects in group polarization. Journal of Personality and social Psychology, 50, 720-728.

Main, G.C., Walker, T.G. (1973). Choice shifts and extreme behavior: Judicial review in the federal courts. The Journal of Social Psychology, 91(2), 215-221.

Moscovici, S. (1967). Communication process and the properties of language. In: L. Berkowitz (Ed.) Advances in experimental social psychology, Vol.3, New York: Academic Press.

Moscovici, S., Lécuyer, R. (1972). Studies in group decision I: Social space, patterns of communication and group consensus. European Journal of Social Psychology, 2(3), 221-244.

Moscovici, S., Zavalloni, M. (1969). The group as polarizer of attitudes. Journal of Personality and Social Psychology, 12, 125-135.

Moscovici, S., Zavalloni, M., Louis-Guérin, C. (1972). Studies on polarization of judgments : I. Group effects on person perception. European Journal of Social Psychology, 2(1), 87-91.

Moscovici, S., Zavalloni, M., Weinberger, M. (1972). Studies on polarization of judgments : II. Person perception, ego involvement and group interaction. European Journal of Social Psychology, 2(1), 92-94.

Myers, D.G., Bach, P.J. (1974). Discussion effects on militarism-pacifism: A test of the group polarization hypothesis. Journal of Personality and Social Psychology, 30, 741-747.

Paicheler, G. (1977). Norms and attitude change II: The phenomenon of bipolarization. European Journal of Social Psychology, 7(1), 5-14.

Spears, R., Lea, M., Lee, S. (1990). De-individuation and group polarization in computer-mediated communication, British Journal of Social Psychology, 29, 121-139.

Stoner, J.A.F. (1968) Risky and cautious shifts in group decision: the influence of widely held values. Journal of experimental Social Psychology, 4, 442-459.

Sunstein, C. (2002). The law of group polarization. Journal of Political Philosophy,10(2), 175-195.

Vandekeere, M. (1979). Risky-shift et polarization: le roman noir de la psychologie sociale. Les Cahiers de Psychologie Sociale, 4, 13-24.

Wallace, P. (1999). The psychology of the Internet. Cambridge: Cambridge University Press.

Yardi, S., Boyd, D. (2010). Dynamic debates: an analysis of group polarization over time on Twitter. Bulletin of Science, Technology and Society, 30(5), 316-327.