JMIR Publications' umbrella policy regarding critical tools (including questionnaires) which are essential to reproduce research is spelled out here:
JMIR Publications strongly encourages authors to make data open as well e.g. publish them as Multimedia Appendix (and we have a new journal - JMIR Data - where authors can get another paper out of their data publication), but it is not a formal requirement at this stage. However, we expect all authors to be able to produce - on request - the original research data for reviewers, editors, or any committees investigating alleged research misconduct. For details please see What is your data sharing policy?
Authors are sometimes resistant to release copyright for source code, and realistically, in the field of technology in health there are often commercial interests involved (which of course should be declared as COI) making the complete release of all source code or even data not a realistic goal. It is also counterproductive as it would deter researchers (and their industry partners) from doing research on commercially available products if we would demand for example that as part of publishing the research, the source code or product would have to be made available freely.
If readers/research users have specific concerns about a specific paper/research or their COIs or lack of reproducibility, we encourage readers to submit a letter to the editor, and we will forward this to the authors and ask for a formal response, and potentially publish them.
Individual JMIR journals may have more specific policies and we are working with our Editor-in-Chief's and Editorial Boards to spell out policies or settle specific disputes.