“…When studying the influence of personal norms on behavior, researchers have mainly relied on the Norm-Activation Model (NAM, Schwartz, 1977; e.g., Ho et al, 2016; Lai et al, 2020), the Theory of Planned Behavior (TPB, Ajzen, 1991, e.g., Schaffner et al, 2017), or a combination of both (e.g., Bamberg et al, 2007; Chen, 2020). The NAM conceptualizes personal norms as a direct predictor of behavior.…”