The study reported in this paper investigated the relationship between components of aptitude and the fluency, lexical variety, syntactic complexity, and accuracy of performance in two types of written and spoken narrative tasks. We also addressed the question of how narrative performance varies in tasks of different cognitive complexity in the written and spoken modes. Our findings indicate a complex interaction between aptitude components and task performance under different conditions. The components of aptitude that seemed to be most strongly related to the complexity and accuracy of production were inductive ability and grammatical sensitivity. The results also show that in writing the participants used more varied vocabulary than in speech, but their performance was similar in terms of syntactic complexity.

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The aim of this study was to investigate the effects of cognitive task complexity and individual differences in input, processing, and output anxiety (IPOA) on L2 narrative production. The participants were enrolled in a bilingual secondary educational program. They performed two narrative tasks in speech and writing. The participants’ level of anxiety was assessed using the IPOA scale (MacIntyre and Gardner 1994). The results demonstrate that spoken and written modalities are influenced differently by anxiety with the impact of output anxiety being significantly stronger in speech than in writing. Another important finding was that input and processing anxiety had both facilitating and debilitating effects on learners’ L2 output. As regards the effect of task complexity on participants’ narratives, the findings suggest that the different stages of language production need to be taken into account when categorizing tasks on the basis of the cognitive load they impose on learners.