Co-evaluation invites co-researchers to collaboratively (in Steps 1 through 5). Co-evaluation assesses and guides the development of the research questions, goals, and objectives as well as research methods. Co-evaluation means that stakeholder and scientific researchers discuss, deliberate, and document the ground rules and definitions of success, the expected challenges, and the unintended effects at the beginning of a project. These rules and definitions are regularly re-visited during the later steps of the research cycle. Co-evaluation may even extend beyond the project’s timeline for long-term assessment of the impact of a citizen social science project. In CoAct, co-evaluation informs and affects the individual steps of the research cycle through responsible planning, shared ownership, inclusiveness and responsiveness, flexibility, and transparency. Overall, these co-evaluation principles maintain a focus on defining, evaluating and monitoring what changes and effective outcomes mean and how they can be achieved in a citizen social science process. here without questions?