Is there any research to support the best number of questions to ask in the survey to get maximum response rate? what are best possible methods to achieve high response rate.
Achieving a high response rate in questionnaire-based research is a function of many factors. The authors need to be sure that the questions are not too much, too difficult to answer or cumbersome, and they must be written in simplified languages. the availability of trained research assistants who are versed in the wording of the respondents and/or interpreters can also not be overemphasized. Ordinarily, a pilot study of a few participants can be performed to determine the plausibility or otherwise of the questionnaire and whether some things need to be adjusted.
Depending on how you are collecting the survey data, a good source might be Dillman et al., Internet, Mail, and Mixed-Mode Surveys: The Tailored Design Method 3rd Edition.
To achieve a high response rate in a survey, you should keep it concise and focused, clearly communicate its purpose and importance, personalize invitations, offer incentives, utilize multiple distribution channels, send reminders, optimize for mobile devices, ensure a user-friendly design, prioritize confidentiality, express gratitude, and share survey results. These strategies can enhance engagement and maximize the number of participants. You could check out the following for more tips.
Draugalis, J. R., Coons, S. J., & Plaza, C. M. (2008). Best practices for survey research reports: A synopsis for authors and reviewers. American Journal of Pharmaceutical Education, 72(1). https://doi.org/10.5688/aj720111