Here's a recent paper about how to compensate for this very illusion, by Heike Hoffman and Marie Vendettuoli: http://users.soe.ucsc.edu/~pang/visweek/2013/infov

Here's a recent paper about how to compensate for this very illusion, by Heike Hoffman and Marie Vendettuoli: http://users.soe.ucsc.edu/~pang/visweek/2013/infovis/papers/hofmann.pdf http://users.soe.ucsc.edu/~pang/visweek/2013/infovis/papers/...