This session will provide a guide to implementing digital collaborative writing as an assessment. This has been used with two cohorts on a final year psychology module. In small groups, students jointly produce a 2000-word critical evaluation of a journal article. They are supported through the process of critiquing the paper and planning and communication stages, building up to the drafting of a formative assessment using Google Docs as a shared digital space for joint composition. Groups are given detailed feedback before handing in the summative assessment. Students then complete an online self and peer assessment of groupwork. The objectives of this session are to outline stages and rationale for this assessment, as well as the pros and cons of this approach from both student and staff perspectives. All materials used in this assessment are available as open educational resources for instructors to use and adapt for their own teaching.