The pandemic crisis of COVID-19 led to higher levels of uncertainty for individuals. Mental health has been outlined as a major key research priority to support and inform interventions. This study aimed to examine whether uncertainty influenced negative affect which in turn, resulted in worst levels of mental health, during the COVID-19 pandemic crisis, and test if neuroticism moderated the negative effect of uncertainty on mental health, via negative affect. To capture changes in daily uncertainty, negative affect and mental health, a daily design was adopted to test our model. We collected data through five consecutive days (N = 320), in the early “lockdown” stage of the pandemic. The multilevel results showed a significant mediation effect from daily uncertainty to daily mental health via daily negative affect. In addition, neuroticism moderated the mediated relationship, in such a way that the relationship between daily uncertainty on daily mental health, via daily negative affect was strengthened when neuroticism was higher. In sum, living without unicorns, or see the world though a black lens, is a factor that enhances the blackness of uncertainty.

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Uncertainty,Negative affect,Mental health,Neuroticism,Diary Study

• Psicologia - Ciências Sociais
• Economia e Gestão - Ciências Sociais