“…All the studies were cross‐sectional, except Serra et al (2019) that assessed participants in two separate sessions 15 days apart. Most of the selected studies (Brunborg et al, 2010; Dulleck et al, 2011; Sütterlin et al, 2011a; Sütterlin et al, 2011b; Dunn et al, 2012; Fooken & Schaffner, 2016; Park et al, 2016, Alacreu‐Crespo et al, 2018; Steenbergen et al, 2020; Forte, Favieri, et al, 2021; Forte, Morelli, & Casagrande, 2021; Drucaroff et al, 2011) controlled confounding variables (age, gender, years of education, neurological, psychiatric and cardiovascular diseases, gastrointestinal diseases, pregnancy, IQ, global cognitive functioning, drug and alcohol use, gambling disorder, medication affecting the central nervous or cardiovascular system, hours of physical exercise per week, smoking, caffeine, social desirability, blood pressure, and body mass index).…”