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This study examines how South Koreans seek and process information about PM2.5 air pollution, amidst concerns of desensitization to its health impacts due to prolonged exposure. A survey was conducted with a sample of 1,500 respondents. Our findings reveal that exposure to PM2.5-related information is positively correlated with risk perceptions and negative emotions. The effect of exposure to PM2.5 information on current knowledge regarding PM2.5 is mediated by perceived information gathering capacity. Interestingly, respondents perceive themselves to have sufficient knowledge about PM2.5, surpassing the threshold knowledge level. This observation contrasts with earlier studies on risk information, suggesting a unique dynamic in the context of PM2.5 pollution. Our findings support the mediation hypotheses, suggesting that exposure and risk perceptions are positively correlated with information seeking effort and systematic processing by eliciting negative emotions. The mediation analysis results also suggest that perceived severity has a more substantial influence on risk information behaviors than perceived susceptibility. [ABSTRACT FROM AUTHOR]

In this study, we analyzed social media conversations during the unfolding of the FTX crisis, the biggest cryptocurrency scandal in United States history. Drawing on the accessibility‐diagnosticity framework, we examined the negative spillover effect of the crisis using a natural language processing approach. We specifically assessed whether there was a negative spillover from FTX to other crypto entities with different levels of diagnostic attribute similarity. We collected a large corpus of Twitter conversations related to the FTX collapse in 2022 and used the association rule analysis to determine the association between FTX and other crypto entities. Our analysis revealed that the number of tweets mentioning FTX and other crypto entities changed in line with a series of real‐world events during the FTX crisis. The negative spillover of the FTX crisis occurred primarily during the first 10 days as the FTX scandal unfolded. The results indicated that the FTX crisis spilled over to highly accessible and diagnostic crypto entities, such as Binance, Bitcoin, and the cryptocurrency industry in general. On the other hand, less accessible and less diagnostic crypto entities/currencies like Ethereum and Coinbase did not experience negative spillover from the scandal. [ABSTRACT FROM AUTHOR]