For the experiments reported here, we use complexity measures representing the sum of the longest distance in word tokens between a head and dependent in a grammatical relation (GR) from the RASP GR output, calculated for each GR graph from the top 10 parses per sentence.
the addition of an incoherence metric to the feature set of an AA system has been shown to improve performance significantly (Miltsakaki and Kukich, 2000;Miltsakaki and Kukich, 2004).