This paper gives an outline of eRisk 2021, the CLEF conference’s fifth edition of this lab. The main
goal of eRisk is to explore issues of evaluation methodology, effectiveness metrics and other processes
related to early risk detection. Early alerting models may be used in a variety of situations, including
those involving health and safety. This edition of eRisk had three tasks. The first task focused on early
detecting signs of pathological gambling. The second challenge was to spot early signs of self-harm.
The third one required participants to fill out a depression questionnaire automatically based on user
writings on social media
Keywords: early risk, erisk, pathological gambling, self-harm, depression