“…noticing health warnings, self-reported cognitive responses to health warnings, and avoidance and forgoing of health warnings), making it more likely that the found effects are caused by the introduced policy because secular trends or other interventions are unlikely to influence these variables. There has been scientific debate at the national Kok, Ruiter, van den Hoek, Schaalma, & de Vries, 2007a;Kok, Ruiter, van den Hoek, Schaalma, & de Vries, 2007b;Peters, Ruiter, Kessel, & Kok, 2013;van der Kemp & Bekker, 2007;Zeeman, Willemsen, & van Gennip, 2007) and international (Biener, & Taylor, 2002;Borland, 2018;Brewer, Hall, & Noar, 2018;Brown & Whiting, 2013;de Bruin, & Peters, 2013;Hasting & MacFadyen, 2002;Kok, Bartholomew, Parcel, Gottlieb, Fernández, 2013;Malouff, 2018; level resolving around the methodological quality and outcome measures of studies claiming effectiveness of threatening communication. According to some, quasi-experimental studies (chapter 3) are the most rigorous alternative for an RCT .…”