“…Specifically: Meta-analyses were excluded if the review concerned studies that examined the effects of non-message variations (e.g., Kumkale et al, 2010 ; Boster et al, 2016 ) or the presence (vs. absence) of some preceding message (e.g., Dillard et al, 1984 ; De Leeuw et al, 2007 ; Feeley et al, 2012 ), compared a message form against a no-message control condition (e.g., Finitsis et al, 2014 ; Braddock and Dillard, 2016 ; Chan et al, 2017 ), examined outcomes other than belief, attitude, intention, or behavior (e.g., O'Keefe and Jensen, 2008 ; Portnoy et al, 2014 ; Lee et al, 2017 ), or were not exclusively experimental studies (e.g., Keller and Lehmann, 2008 ; Tukachinsky and Tokunaga, 2013 ).…”