The impact of mixed emotions on judgements: a naturalistic study during the FIFA world cup.

Experiencing mixed emotions, a combination of two oppositely-valenced emotions, has been shown to reduce bias in decision making and improve the accuracy of judgements made. However, most previous research has been limited to laboratory-based experiments. In this pre-registered study, we looked at mixed emotions and judgements in the naturalistic context of watching sport during the FIFA world cup. 80 participants reported on mixed emotions before and after each England game during the World Cup, and made score predictions for each game, collecting a total of  = 480 observations. We used a lagged-effect design and multilevel modelling to analyse the data. We found that participants who felt more mixed emotions at the end of a match made significantly more likely score predictions in the following match, indicating that experiencing stronger mixed emotions subsequently predicted more reasonable judgements. This result was supported even after controlling for a number of affective, attitudinal, and socio-demographic variables. This provides evidence that naturally occurring mixed emotions are related to improved real-world judgements. The evidence is discussed through the lens of fantasy realisation theory, and the importance of feeling mixed during decisions involving puzzling or uncertain outcomes is emphasised.