Taking stock of the overall confused picture that research and innovation (R&I) literature and practices offer with regard to citizen and stakeholder participation, this book provides a methodical conceptual and an empirical analysis to determine the connection between ethics and participation. Strong theoretical pillars in the fields of ethics, politics and responsible research and innovation (RRI) form the backbone of this critical approach to participation, which considers new approaches to democratic participation. Taking into account a number of participatory processes, Responsive Ethics and Participation establishes a new methodology to differentiate, classify and understand the added value of the participation of citizens and stakeholders in R&I.Participation could be considered the epitome of innovation ethics. However, its multidimensionality, its ethical and theoretical grounds and the nature of the involvement and related outcomes must be clarified at the outset, in order to reach active forms of participation. Ethical participation is required for reliable developments in science and technology, which is what this book ultimately demonstrates.