“…Recently, a growing body of results has supported the idea that the left-right axis is a relevant spatial reference in order to metaphorically understand continuous abstract concepts. Indeed, mapping between such an axis and concepts such as numbers, time, and even politics is now strongly supported (Casasanto & Boroditsky, 2008;Dehaene, Bossini, & Giraux, 1993;Oppenheimer & Trail, 2010;Ren, Nicholls, Ma, & Chen, 2011; for recent reviews, see Bonn & Cantlon, 2012;Dijkstra, Eerland, Zijlmans, & Post, 2014;Winter et al, 2015). Together with our present results regarding the concept of valence, we assume the possibility that humans could have a kind of general tendency to represent continuous abstract concepts via the metaphor of a left-right continuum.…”