“…In terms of sustainable consumption, social normative influences were already the subject of research regarding food choice (Chekima, Chekima, & Chekima, 2019; Dowd & Burke, 2013; Zhou, Thøgersen, Ruan, & Huang, 2013), purchase of everyday necessities (Demarque et al, 2015; Minton & Rose, 1997; Pickett‐Baker & Ozaki, 2008), energy‐efficient household appliances (Nguyen, Lobo, & Greenland, 2016) and clothing (Kim et al, 2012). While numerous studies evidence effects of social normative influences on sustainable consumption practices (e.g., Cheah, Shimul, Liang, & Phau, 2020; Demarque et al, 2015; Dowd & Burke, 2013; Joshi, Sangroya, Srivastava, & Yadav, 2019; Kim et al, 2012; Loschelder, Siepelmeyer, Fischer, & Rubel, 2019; Minton & Rose, 1997), there are instances that evidence none (Chekima et al, 2019; He & Kua, 2013; Zhou et al, 2013), while others report their ambiguous influence—they affect intentions, but not behaviour (Nguyen, Lobo, Nguyen, Phan, & Cao, 2016). More importantly, while it is theoretically implied that social norms function as a catalyst to personal norm formation, which, in turn, represents the primary determinant of pro‐social behaviour (Hopper & Nielsen, 1991), most studies on sustainable consumption do not explicitly investigate this motivational route as well as its relevance for influences of perceived social norms on behavioural intentions.…”