*<p>Significance according to permutation test (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0033992#s4" target="_blank">methods</a>). Effects of bystander coreferentiality were checked for all significant tests (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0033992#s4" target="_blank">methods</a>), but rates of simulated bystander data reaching the respective test significance never exceeded 5%.</p
