“…Three lines of evidence suggest that simple frustration of this sort is not the emotion underpinning children's responses in this type of choice procedures: first, whether children report feeling sad is moderated by their level of responsibility in determining the outcome (O'Connor, McCormack, Beck, & Feeney, 2015;Weisberg & Beck, 2012), which would be predicted if regret was the underpinning emotion. Second, children also report feeling sad after receiving the relevant counterfactual information even if they already know they have not got the best available prize (McCormack, O'Connor, Beck, & Feeney, 2016). Third, when children are asked to provide explanations of their reported change in emotions, the majority of 6-to 7-year-olds make explicit reference to the counterfactual prize, and around a third of children use counterfactual language in their explanations (O'Connor et al, 2012).…”