Discourse production after right brain damage: Gaining a comprehensive picture using a multi-level processing model

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.

► We used a multi-level model to assess discourse after right brain damage.
► Standardised cognitive and communication tests were within normal limits.
► Discourse was analysed in terms of seven broad areas relating to the model.
► Syntactic complexity, clarity disruptors, fluency and other aspects were impaired.
► A model-based theory accounts for these deficits and gives clinical guidelines.