Abstract
This study examined the effects of right brain-damage (RBD) on oral discourse production using a multi-layered discourse processing model. Narrative and procedural discourse samples from participants with RBD and no brain damage were analysed in terms of seven broad areas corresponding to the processing levels of the model. Participants also completed attention, cognitive, general communication and RBD assessments. Despite their normal performance on all assessments (except those on attention), the participants with RBD demonstrated statistically significant differences in syntactic complexity, clarity disruptors and dysfluencies, as well as in discourse grammar and clausal structure in the narratives and in cohesion in the procedures. A model-based theoretical explanation accounting for the deficits noted in participants with RBD, together with clinical guidelines, is provided. © 2012 Elsevier Ltd.