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Lexical Variety in Oral Production of L2 Learners of English as a Factor in Determining Language Proficiency
Škutová, Zuzana ; Gráf, Tomáš (advisor) ; Jiránková, Lucie (referee)
Lexical variety (also referred to as lexical diversity) is a term used to describe the range of lexis used in texts. It constitutes a subcategory of language complexity, which is one of the three components of the CAF theory, that operates with complexity, accuracy and fluency These terms are used in linguistic research to describe language proficiency of native (L1) speakers, but they are also for example part of the CEFR framework, which classifies non- native (L2) speakers into categories based on their overall language competence. The majority of research within the area of lexical variety still focuses mainly on written language. As a result, the analysis of spoken production stays neglected. The analysis of spoken language can be more labour intensive as the data need to be transcribed and pruned before evaluation. A possible simplification would be to work with spoken language corpora that have already been compiled, which is the solution adopted to obtain data for the purpose of this thesis. The corpus used here is the LINDSEI_CZ, this sub-corpus contains transcriptions of Czech L2 speakers of English. The speakers were sorted into proficiency levels between B2 and C1 according to the CEFR standards. The aim of this thesis was to find if there is a significant difference in lexical variety...
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