“…Finally, we may wonder why, on average, about a third of participants are not susceptible to the flushtration count illusion. According to recent studies (Ekroll, 2019; Ekroll et al, 2021; Pailhès & Kuhn, 2020; Thomas et al, 2018; see also Kahneman, 2003), intuitive simplifications may affect the interpretation of a wide range of ambiguous visual sequences to make sense of them. Recently, several studies have focused on a perceptual illusion that also affects around two-thirds of participants: the vanishing ball illusion (Kuhn et al, 2010; Kuhn & Land, 2006; Kuhn & Rensink, 2016; Thomas & Didierjean, 2016a, 2016b).…”