Fig. 2From: To have your citizen science cake and eat it? Delivering research and outreach through Open Air Laboratories (OPAL)A model demonstrating the relationship between project goals, operations and outcomes, the indicators of which contribute towards a successful citizen science project. Goal and outcome indicators are derived by research conducted by Haywood and Besley [12, 45] and operational indicators are derived from lessons learned throughout the OPAL programmeBack to article page