We're collaborating with another researcher from another institution. Collaborating here means that we do the whole work (study design, questionnaire development and testing etc.) and the other researcher provides access to patients, potential study participants. We usually wait for months for a reply when we have a question and progress is really slow.
Now, there are pretty clear signs that this other researcher may try to take over the whole project and write the publication alone. For me personally, this is not my most important project, but it would still bother me if you would have invested so much time for nothing.
Would it be an option to license our questionnaire to have it as a hostage for the worst case or what would be a good option?
Spoiler: communication is complicated.