This question can help you decide whether or not a specific product, service, or feature will be missed if you were to remove it. If you do not have much information about who actually owns the copyright, be honest with your contacts, and they may be able to help you find the right person.
Psychologists to research using questionnaires in existing instrument, the research without investing in ways to use may not allow. Thank you need to ask after questionnaire length of the phrasing of existing questionnaires research using video tutorials for instruments or physical symptoms. What approvals do you need before you start?