In the wake of major events, whether these be terrorist attacks 1 , global pandemics such as the coronavirus disease 2019 (COVID-19) outbreak 2,3 or presidential elections 4 , conspiracy theories predictably surge across the Internet. Conspiracy theories, defined as beliefs that a group of actors are colluding in secret to reach a malevolent goal 5,6 , are common across times, cultures and populations 7,8 . Accumulating research has revealed that a reliable predictor of belief in one conspiracy theory is belief in another conspiracy theory 1,[9][10][11] . It therefore appears that people differ in their predisposition to explain events as conspiracies, which is sometimes referred to as 'conspiracy mentality' or the 'conspiracy mindset' [12][13][14] . The conspiracy mindset is closely associated with belief in a wide range of existing specific conspiracy theories, as well as the endorsement of conspiracy theories created by researchers for experimental purposes 15 . It differs from concrete conspiracy beliefs in that it taps into the general propensity to suspect that conspiracies are at play, uncontaminated by concrete events, actors or contexts.The political realm in particular is one key area where conspiracy beliefs are salient and thriving 16 . For instance, conspiracy theories are intrinsically connected to the rhetoric of populist political leaders who arguably exploit conspiracy theories for strategic reasons 17,18 . Importantly, citizens' belief in conspiracy theories predicts voting behaviour and intentions 19,20 and non-normative political action 21,22 . Traditionally, conspiracy beliefs have been associated with authoritarian worldviews 23,24 , as exemplified by positive relations between conspiracy beliefs and right-wing authoritarianism [25][26][27] . Stripping a politically right-wing stance from the surplus meaning of authoritarianism (and its strong connection to traditions and authorities), many studies have found a linear relationship between self-reported political orientation and conspiracy endorsement 16,28,29 , suggesting that conspiracy beliefs are more common at the political right than at the political left [30][31][32][33] .However, in contrast to this simple, linear relation, numerous findings point to a curvilinear relation between political orientation

Can conspiracy theories be a source of social stigma? If it is true, it would follow that people may expect to be socially excluded when they express endorsement of conspiracy theories. This effect should be partially explained by the knowledge of the negative perceptions associated with conspiracy theories. In Study 1, inducing French internet users to write a text endorsing (vs. criticizing) conspiracy theories about the Charlie Hebdo shooting, led them to anticipate fear of social exclusion. This effect was mediated by anticipated negative evaluation of the self. In Study 2, inducing French internet users to imagine defending (vs. criticizing) conspiracy theories about the Charlie Hebdo shooting in front of an audience led them to anticipate fear of social exclusion. The effect was again mediated by anticipated negative evaluation of the self. To conclude, our findings demonstrate that conspiracy theories can be viewed as a source of social stigma.

The COVID-19 pandemic has increased negative emotions and decreased positive emotions globally. Left unchecked, these emotional changes might have a wide array of adverse impacts. To reduce negative emotions and increase positive emotions, we tested the effectiveness of reappraisal, an emotion-regulation strategy that modifies how one thinks about a situation. Participants from 87 countries and regions (n = 21,644) were randomly assigned to one of two brief reappraisal interventions (reconstrual or repurposing) or one of two control conditions (active or passive). Results revealed that both reappraisal interventions (vesus both control conditions) consistently reduced negative emotions and increased positive emotions across different measures. Reconstrual and repurposing interventions had similar effects. Importantly, planned exploratory analyses indicated that reappraisal interventions did not reduce intentions to practice preventive health behaviours. The findings demonstrate the viability of creating scalable, low-cost interventions for use around the world.

Research suggests that belief in conspiracy theories (CT) stems from basic psychological mechanisms and is linked to other belief systems (e.g., religious beliefs). While previous research has extensively examined individual and contextual variables associated with CT beliefs, it has not yet investigated the role of culture. In the current research, we tested, based on a situated cultural cognition perspective, the extent to which culture predicts CT beliefs. Using Hofstede's model of cultural values, three nation‐level analyses of data from 25, 19, and 18 countries using different measures of CT beliefs (Study 1, N = 5323; Study 2a, N = 12,255; Study 2b, N = 30,994) revealed positive associations between masculinity, collectivism, and CT beliefs. A cross‐sectional study among U.S. citizens (Study 3, N = 350), using individual‐level measures of Hofstede's values, replicated these findings. A meta‐analysis of correlations across studies corroborated the presence of positive links between CT beliefs, collectivism, r = .31, 95% CI = [.15; .47], and masculinity, r = .39, 95% CI = [.18; .59]. Our results suggest that in addition to individual differences and contextual variables, cultural factors also play an important role in shaping CT beliefs.