Stamos Papastamou | Panteion University of Social and Political Sciences

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Papers by Stamos Papastamou

Psychology: The Journal of the Hellenic Psychological Society, 29(2), 144–157, 2024

The present paper aims to contribute to a convergence of two distinct approaches to social influ... more The present paper aims to contribute to a convergence of two distinct
approaches to social influence, one based on persuasion literature, and one
based on the genetic model of social influence. Moreover, the goal is to
disentangle the conditions that affect the complex relations among source
status (majority vs. minority), kind of influence (direct vs. indirect), type of
argumentation (strong vs. weak), and psychological processes (cognitive
processing vs. comparison validation elaboration). In both experiments source
status and argument quality were manipulated, and a third independent
variable was introduced, the introduction (or not) of a thought listing task
(Experiment 1), and the introduction of differential psychological process,
cognitive processing (via a thought listing task) vs. comparison validation
elaboration (via a source-message evaluation) (Experiment 2). Analyses
showed that, in Experiment 1, the no-thought list conditions led to greater
direct influence whereas the thought listing conditions led to greater indirect
influence. Also, minority influence was greater than majority influence. In
Experiment 2, only in the thought-listing conditions, as in Experiment 1, strong
arguments led to greater direct influence than weak arguments; for indirect
influence significant results were found for minority source only: weak
arguments were more influential in thought listing condition than source
message evaluation condition and strong arguments in source-message
evaluation condition. These findings are discussed in the light of bringing
together two distinct thus far approaches to social influence.

ΨΥΧΟΛΟΓΙΑ | PSYCHOLOGY, 29(2), 144-157, 2024

not stimulus characteristics, determine information processing in minority influence. In

The Blackwell Encyclopedia of Sociology, 2010

Statistics, Politics and Policy

In this paper, we investigated the utility of data mining to classify individuals into predefined... more In this paper, we investigated the utility of data mining to classify individuals into predefined categories of a target variable, based on their social and political attitude. Data collected for a social psychology study conducted in Greece in 1994 were used for this purpose. We established the theoretical background of our analysis through explanatory factor analysis. We ran the decision tree algorithm CHAID in order to build a predictive model that classifies the study participants in terms of their attitude toward physical and symbolic violence. The CHAID algorithm provided a decision tree that was easily interpreted, and which revealed meaningful predictive patterns. CHAID algorithm showed satisfactory predictive ability and promising alternatives to social psychology data analysis. To the best of our knowledge, there is no other evidence in the literature that the decision tree algorithms can be used to identify latent variables.

Serge Moscovici’s work, 2021

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Serge Moscovici, 2019

Sont présentées ici quelques pistes de réflexion susceptibles de lever le cloisonnement que Serge... more Sont présentées ici quelques pistes de réflexion susceptibles de lever le cloisonnement que Serge Moscovici lui-même avait érigé entre ses deux grandes théories, celle des représentations sociales et celles de l'influence minoritaire. On essaie de montrer notamment que les principes organisateurs de la théorie des minorités actives (le conflit sociocognitif, les styles de comportement de la source d'influence, la dtinction entre influence directe et indirecte, etc) existaient déjà dans le travail de Moscovici sur les représentations sociales de la psychanalyse. On suggère enfin que le voisinage conceptuel de ces deux théories pourraient ouvrir de nouvelles pistes de recherche en psychologie sociale, amplifiant de la sorte l'importance de l'apport déjà considérable de Serge Moscovici à cette discipline.