As staff developmental initiatives become increasingly common in educational institutions, the evaluation of such programmes may need careful consideration. This paper describes a staff developmental initiative in which a one-on-one mentoring service was offered as part of a funded staff development project entitled 'Effective English Communication for Teaching and Research' (EECTR). EECTR provides language support to all academic staff in a Hong Kong university. The mentoring sessions typically require a discussion of the nature of academic writing. For evaluation purposes, feedback was collected through various questionnaires which indicated that the EECTR mentoring had been a fairly successful programme. However, these traditional measures could not tell the stakeholders the impact of the mentoring process on individual clients. Thus two additional measures were taken. First, three in-depth case studies were undertaken to ascertain how individuals saw the impact of mentoring. Additionally, interviews with clients were also conducted over a two-year period. With support from the data, this paper demonstrates how multiple measures of evaluation provided an opportunity to see the dynamic interaction between general perceptions of impact and individual learning within a programme. [Copyright of Assessment & Evaluation in Higher Education is the property of Routledge. Full article may be available at the publisher's website: http://dx.doi.org/10.1080/0260293022000001373]
