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Vocabulary and reading comprehension in teacher education It is widely recognized that vocabulary is closely tied to reading comprehension, and correlations between these two constructs, even if differently defined across studies, vary between .6 and .8. But correlation is not a causal relationship, and does not provide enough basis for a comprehensive conceptual explanation. Reversing the problem, it is still highly controversial whether specific interventions on vocabulary instruction can massively influence reading comprehension, and this particularly in adult learners, indicating that a lot remains to be investigated in the field of vocabulary knowledge transfer to other components of language proficiency. Recent studies showed that the weak link for understanding this apparent gap lies probably in the way vocabulary is assessed. This article shows the results of a two-year research project aimed at assessing future teachers’ vocabulary related to school everyday life issues, focussing both on language for specific purposes and on general language. In particular, different typologies of reading comprehension tests, of vocabulary tests (receptive and productive), on paper and pencil and on computer-based administrations, were adopted and compared.