However, to find out if the value of R is significant, we must use a permutation test with a Monte Carlo technique described by Good (1995) , following closely the same usage by <cite>Nerbonne and Wiersma (2006)</cite> . The intuition behind the technique is to compare the R of the two corpora with the R of two random subsets of the combined corpora. For comparison to the experiment conducted by <cite>Nerbonne and Wiersma (2006)</cite> , the experiment was also run with POS trigrams.