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This paper describes our submissions to the machine translation evaluation shared task in ACL WMT-08. Our primary submission is the Meteor metric tuned for optimizing correlation with human rankings of translation hypotheses. We show significant improvement in correlation as compared to the earlier version of metric which was tuned to optimized correlation with traditional adequacy and fluency judgments. We also describe m-bleu and m-ter, enhanced versions of two other widely used metrics bleu and ter respectively, which extend the exact word matching used in these metrics with the flexible matching based on stemming and Wordnet in Meteor.
Agarwal et al. (Tue,) studied this question.