This exploratory study aims at identifying macro-social factors associated with the international variance of belief in conspiracy theories. We computed a Conspiracy Index for 22 Western and non-Western countries based on the results of an online survey on conspiratorial beliefs. Stepwise regression analyses show that more than 70% of the international variance of this Conspiracy Index is explained by the following three national variables: the level of democracy, the unemployment rate, and the perceived level of public sector corruption. Conspiracy theories thus appear to be more commonly endorsed in countries where people cannot take an active part in the political life of their country (low level of democracy), where they may feel socially threatened (high unemployment rate), and where institutions and authorities are perceived as untrustworthy (high perception of public sector corruption).

'Strong conformity' corresponds to the public endorsement of majority opinions that are in blatant contradiction to one's own correct perceptual judgements of the situation. We tested strong conformity inference by 3- and 5-year-old children using a third-person perspective paradigm. Results show that at neither age, children spontaneously expect that an ostracized third-party individual who wants to affiliate with the majority group will show strong conformity. However, when questioned as to what the ostracized individual should do to befriend others, from 5 years of age children explicitly demonstrate that they construe strong conformity as a strategic means of social affiliation. Additional data suggest that strong and strategic conformity understanding from an observer's third-person perspective is linked to the passing of the language-mediated false belief theory of mind task, an index of children's emerging 'meta' ability to construe the mental state of others. Statement of contribution What is already known on this subject? 'Strong conformity' corresponds to the public endorsement of majority opinions that are in blatant contradiction to one's own correct perceptual judgements of the situation. Asch's (1956, Psychological Monographs: General and Applied, 70, 1) classic demonstration of strong conformity with adults has been replicated with preschool children: 3- to 4-year-olds manifest signs of strong conformity by reversing about thirty to forty per cent of the time their correct perceptual judgements to fit with contradictory statements held unanimously by other individuals (Corriveau & Harris, 2010, Developmental Psychology, 46, 437; Corriveau et al., 2013, Journal of Cognition and Culture, 13, 367; Haun & Tomasello, 2011, Child Development, 82, 1759). As for adults, strong conformity does not obliterate children's own private, accurate knowledge of the situation. It is in essence a public expression to fit the group and alleviate social dissonance. What does this study add? In three experiments, we explored the developmental emergence in the preschool years of strong conformity inference from a third-person perspective. Results show that by 5 years of age, and not earlier, children begin to construe strong conformity as a strategy that someone should use to gain social affiliation, even though they do not anticipate that a third-party individual would necessarily resort to such strategy. Additional data suggest that strong and strategic conformity understanding from an observer's third-person perspective is linked to the passing of the language-mediated false belief theory of mind task.

The aim of this research is to identify what social and psychological variables may attract people to a social protest movement, namely the Yellow Vests (YVs) in France, which originated in October 2018. This analysis, albeit correlational, may nevertheless give important hints to identify in an exploratory way what causal factors could lead people (a) to become a sympathizer of the movement and (b) to become a member of that movement, and what psychosocial consequences would derive from (a) and (b). Notably, the role of conspiracy beliefs and anomie will be scrutinized because of their role in fostering non-normative political violence. In this purpose, we analyzed the results of a poll conducted on a representative sample of the French population (N = 1760). This survey explored a range of respondents' attitudes towards social issues and towards the YVs movement. Our analyses showed that adherence to the YVs movement is mainly caused by socio-economic factors (such as educational level, economic capital) and belonging to political extremes (far left and even more far right), relying on and probably increasing distrust toward authorities and unconventional beliefs (paranormal and conspiracist). Ultimately, adherence to the movement seems triggered by the objective factor of dependency on a car and endorsement of conspiracist beliefs; whereas, simple sympathy is related to a less irrational form of accusation of authorities, low subjective economic capital, and pessimism toward the future. YVs also more often use social media and Youtube, but less often use media websites and newspapers as their first source of information.

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