“…Some of studies showed that nudging could promote healthy eating (Dubbert, Johnson, Schlundt, & Montague, 1984;Feldman, Mahadevan, Su, Brusca, & Ruzsilla, 2011;McDaniel, Hunt, Hackes, & Pope, 2001) while some couldn't (Buscher et al, 2001;Feldman, Mahadevan, Su, Brusca, & Ruzsilla, 2011). For instance, Feldman et al (2011) investigated the effect of nutritional menu labelling on older people's meal selection, and they didn't find substantial effect on facilitating healthier meal choice, however, boxing menu items successfully encouraged older people to choose the meal with heathy items. Considering the differences of nudging designs and specific intervention operations, results may be influenced by multiple factors like stimuli, sample design, social interaction and environment.…”