Abstract (236 words) This chapter explores the ways in which academic educators’ experience of collaborative inquiry-based learning can illuminate student behaviours, particularly in relation to assessment and the affective domain. The facilitator of this IBL, in the setting of academic staff development in United Kingdom Higher Education, uses a reflective story-telling style to detail the learning of an annual cohort of staff at a university in the north west of the UK. Six separate academic staff cohorts enrolled on a unit, as part of an Master of Arts in Academic Practice, to undertake this experiential, humanist way of learning, working with all the principles of collaborative inquiry. The chapter explores the ways in which the participants’ self-reported affective responses altered over the course of the unit, particularly in relation to the assessment. Participant reflections are integrated with pedagogic literature and extracts from the facilitator’s contemporaneous notes, assessor’s feedback and other material, detailing the ways in which the freedom of an IBL episode moves to anxiety associated with assessment, which can build as the assessment point nears. Reflections on group constitution, cohort characteristics and the role of the facilitator, are considered in relation to the notion of ‘success’ of IBL episodes. This is interrogated particularly in relation to academic staff responses to the experience of the emotions of inquiry-based learning, and how this may affect their own practice in designing teaching and learning experiences for students in Higher Education