摘要：AbstractThe original impetus for this cross-linguistic study came from a need to explore the effect of cultural factors and generic conventions on the use and distribution of metadiscourse within a single genre. To this end, the study as a contrastive rhetoric research examined a corpus of 60 newspaper editorials (written in English and Persian) culled from 10 elite newspapers in America and Iran. Based on Hyland's (2005) model of metadiscourse, both interactive and interactional metadiscoursive resources were analysed. The results disclosed that genre conventions had a determining role in the writers’ choice of some metadiscourse resources that contributed to some similarities in the use and distribution of metadiscourse resources across English and Persian data. In addition, some differences were found between two sets of editorials which were attributed to cultural/linguistic backgrounds of both groups of editorialists. The interactional category and attitude markers proved to be, respectively the predominant metadiscourse category and subcategory in newspaper editorials genre. Overall, the findings suggested that metadiscourse has a decisive role in construction of persuasion in newspaper editorials genre.
