Genre-based literacy pedagogy: the nature and value of genre knowledge in teaching and learning writing on a university first year media studies course

A thesis submitted to the Faculty of Humanities, Uniiversity of Luton, in partial fulfilment of the requirements for the degree of Doctor of PhilosophyIn the teaching and learning of literacy, descriptions of text have a problematic status as a result of the growing understanding of literacy as both a cognitive process and a social practice. In the teaching of academic subjects at university, student text is not usually an object of study. The research in this thesis draws on a language based theory oflearning to place textual description at the centre of the teaching and learning of both literacy and academic subjects at university. Participant observation and practice-based research methods were used to implement a form of text-oriented literacy teaching and to explore its compatibility with processes and practices orientations to literacy. Over an eighteen month period, systemic functional grammar was used to investigate and describe the texts of a film studies classroom and the descriptions were used in genre based literacy pedagogy. The effects of the pedagogy are measured in terms of students' performance in an end of course assignment, students' accounts of their writing processes, and student and subject-tutor perception of the text description and the pedagogy. In the thesis, a linguistic description of a key curriculum genre -a Taxonomic Film Analysis -is presented. An account is given of the pedagogy by means of which this essay genre was represented in the film studies classroom as a realisation of choices from linguistic, conceptual and activity systems. Systemic functional grammar-based text description is seen to have provided a means whereby a literacy tutor could collaborate with a subject tutor to provide a subject-specific form of literacy teaching which was evaluated as relevant by students and tutors. The account and the evaluation help to clarify the role that description of text can play in relation to processes and practices ofliteracy use in the teaching and learning of literacy in a film studies classroom and have implications for the teaching and learning of literacy at university more generally

Tune your brown clustering, please

Brown clustering, an unsupervised hierarchical clustering technique based on ngram mutual information, has proven useful in many NLP applications. However, most uses of Brown clustering employ the same default configuration; the appropriateness of this configuration has gone predominantly unexplored. Accordingly, we present information for practitioners on the behaviour of Brown clustering in order to assist hyper-parametre tuning, in the form of a theoretical model of Brown clustering utility. This model is then evaluated empirically in two sequence labelling tasks over two text types. We explore the dynamic between the input corpus size, chosen number of classes, and quality of the resulting clusters, which has an impact for any approach using Brown clustering. In every scenario that we examine, our results reveal that the values most commonly used for the clustering are sub-optimal