Perceived expert and laypeople consensus predict belief in local conspiracy theories in a non-WEIRD culture: Evidence from Turkey

Past research has shown that perceived scientific consensus (or lack thereof) on an issue predicts belief in misinformation. In the current study (N = 729), we investigated how perceived consensus among both experts and laypeople predicts beliefs in localized and specific conspiracy theories in Turkey, a non-WEIRD country. Participants in our study were found to overestimate consensus among both experts and laypeople regarding baseless conspiracy theories surrounding the alleged secret articles of the Lausanne Treaty and unused mining reserves in Turkey. Notably, conspiracy believers exhibited a higher tendency to overestimate consensus compared to non-believers. Furthermore, perceived expert consensus had a stronger association with conspiracy beliefs than perceived laypeople consensus. We also explored the correlates of conspiracy beliefs and perceived consensus, including socioeconomic factors, worldview, cognitive sophistication, and personality. The results further indicate that the correlations between belief and perceived consensus manifest with comparable magnitudes, irrespective of the specific conspiracy theories under consideration. These findings support the potential of perceived consensus as an important factor for understanding conspiracy beliefs.