One important feature of an effective document that makes it easy to read and understand is known as coherence. Technical documents produced collaboratively are often incoherent due to a lack of group consensus and misaligned contributions by the individual authors. However, current document planning techniques and writing tools do not provide explicit support for improving coherence. The goal of this research, therefore, is to develop and evaluate a new technique and tool that helps teams of authors to structure coherent technical documents. The coherence of a document can be attributed to the story (or narrative) it conveys to the reader. If this story is consistent and coherent, the same can be said about the document. A discourse theory such as Rhetorical Structure Theory (RST) that has been developed by linguists helps further to analyse and improve a narrative. RST explains the coherence of a text by virtue of relationships (such as “paragraph A justifies paragraph B”) between parts of the text. This research has combined the ideas from these parallel strands of research to develop a new document planning technique called narrative-based writing. The method involves writing down an explicit précis of the story (called a document narrative or DN) and then analysing it using RST. The DN and RST analysis are then used to structure the eventual document. To extend the usability of narrative-based writing to geographically-dispersed authors, I have designed and implemented a collaborative tool that allows co-authors to edit, analyse and review DNs. The thorough design for the tool uses a combination of three models (conceptual, business process and functional) culminating in a set of functions that enable collaborative narrative-based writing. This dissertation discusses how, in the future, these functions could be incorporated in existing collaborative writing tools. Implementing this tool, albeit in its current prototypic state, has been invaluable in understanding the complexities of modelling and manipulating DNs and RST structures. Initial investigations using the new technique and tool have been positive, encouraging me to continue the research and evaluation in this field.

This study explores Cummins' interdependence hypothesis in the South African context. The design is experimental, involving Zulu primary language writing instruction to explore whether skills taught in Zulu composition classes transfer into English expository writing. The intervention and control groups were drawn from two ex-Model C high schools and the focus was on measuring use of coherence and cohesion in English essays. Quantitative findings showed, although the intervention group's writing skills did not improve significantly, they did not decline. By contrast, the control group's writing skills declined significantly. A more qualitative investigation of the corpus supports the statistical findings. However, because of the limitations of this study, more research is required into Cummins' hypothesis, bilingual programmes and teaching academic writing skills in African languages. It is hoped that this research design will benefit future researchers investigate the current debate about the efficacy of bilingual and multilingual approaches to education. / Linguistics / M. A. (Applied Linguistics)

This study explores Cummins' interdependence hypothesis in the South African context. The design is experimental, involving Zulu primary language writing instruction to explore whether skills taught in Zulu composition classes transfer into English expository writing. The intervention and control groups were drawn from two ex-Model C high schools and the focus was on measuring use of coherence and cohesion in English essays. Quantitative findings showed, although the intervention group's writing skills did not improve significantly, they did not decline. By contrast, the control group's writing skills declined significantly. A more qualitative investigation of the corpus supports the statistical findings. However, because of the limitations of this study, more research is required into Cummins' hypothesis, bilingual programmes and teaching academic writing skills in African languages. It is hoped that this research design will benefit future researchers investigate the current debate about the efficacy of bilingual and multilingual approaches to education. / Linguistics and Modern Languages / M. A. (Applied Linguistics)