I am so glad OP felt so strongly after reading this paper they were open to us (collectively) reading said paper as well. Then we could all understand on what metrics this was judged. Even this image isnt about left vs right anything (even tho it used the colors) it was about disagree to agree, but on what question? Where was it done? what was the age group? What were the socioeconomic break downs of these people? Fucking nothing, much like the actual content and reasoning of this poster.