Existing training programmes in the field of public service interpreting and translation (PSIT) do not to focus on how best to develop students’ lexical competence and corpora-based search skills. This paper reports the design, implementation and evaluation of a novel corpus-based module intended to develop Spanish postgraduate PSIT students’ lexical competence and search strategies. Adopting a mixed-methods quasi-experimental design, we administered a pre- and post-test to both an experimental group and a control group to collect quantitative data and determine whether the corpus-based module contributes to improving participants’ lexical competence and search strategies. Semi-structured focus groups were conducted to collect qualitative data, which were thematically analysed. The findings indicate that a corpus-based methodology significantly improves PSIT students’ skills in these areas, leading to the conclusion that such an approach should be adopted more widely in PSIT pedagogy.
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