depentds on what you are searching for are they enough to answer your research question. even one respondent is enough if you are doing case study on one person. there ıs the term saturation of data if you reach that level and you can answer the research question why not. ( might be plenty then

I agree with the previous comment - it depends. HBowever, I found this article very useful

Guest, G., Bunce, A., & Johnson, L. (2006). How many interviews are enough? An experiment with data saturation and variability. Field methods, 18(1), 59-82.

Hello,

I agree with the comments above; in a grounded theory study that we carried out using semi-structured interviews, data saturation was reached after interviewing 22 participants (one was interviewed twice). We really felt that there was no new data.

Your question was similar to others that were asked previously:

https://www.researchgate.net/post/whats_data_saturation_in_an_interview

https://www.researchgate.net/post/How_many_interviews_are_enough_in_qualitative_research_case_study_studies

This paper might also be of interest:

http://eprints.ncrm.ac.uk/2273/4/how_many_interviews.pdf

Very best wishes,

Mary

Thank you for all recommendation and answer. Yes the data from the semi structured interview is already answered my research question.

Hi, I also agree with comments above. Best wishes, M Lucia