9. The method of claim 1 , wherein determining a number of cohesive devices expected in the text further comprises: determining a total number of words in a consecutive pair of sentences; determining a number of cohesive devices expected in the pair of consecutive sentences based on the total number of words; wherein the number of cohesive devices expected in the text is based on a sum of cohesive devices expected in a plurality of pairs of consecutive sentences in the text.
9. The method of claim 1 , wherein determining a number of cohesive devices expected in the text further comprises: determining a total number of words in a consecutive pair of sentences; determining a number of cohesive devices expected in the pair of consecutive sentences based on the total number of words; wherein the number of cohesive devices expected in the text is based on a sum of cohesive devices expected in a plurality of pairs of consecutive sentences in the text. 16. The method of claim 9 , wherein the cohesiveness metric is calculated according to: ASOA = ∑ i = 1 n ⁢ x i ∑ i = 1 n ⁢ E ⁡ [ x i ] , where x i =1 when sentence i includes a cohesive device where sentence i includes a reference to sentence i−1, and E[x i ] is an expected probability of a cohesive device being present in sentence i based on a length of sentence i and sentence i−1.