We explored collaboration between scientists and nonscientists through a deliberative process in which stakeholders interested in the health challenges of honey bees gathered on four occasions over two years to design, carry out, and analyze a set of field experiments on honey bee health. We found that issues of trust and authority were crucial matters in constraining and enabling dialogue among our deliberants. Over the course of our deliberations, participants' trust for one another and appreciation of their respective interests grew, and differences in professional status appeared to play an increasingly less important role in shaping discussion. The field experiments that deliberants crafted and collectively organized over time became an engagement object that was crucial in altering the dynamics of trust and authority. We understand engagement objects as entities that stakeholders with diverse interests, experiences, and expertise collectively build over time to collectively solve overlapping, interacting problems. [ABSTRACT FROM AUTHOR]