Sample size (or number of clusters) by treatment arms
800 participants in the "outcome and choice revealed" condition (400 participants in "agent" role and 400 participants in "principal" role),
800 participants in the "outcome hidden" condition (400 participants in "agent" role and 400 participants in "principal" role),
800 participants in the "choice hidden" condition (400 participants in "agent" role and 400 participants in "principal" role)