Obebinaru - you are not limited to just questions - depending on your approach and methodologies. It is usual to use questions for qualitative phases - but you can use questions, statements or hypotheses for the quantitative phase - depending on what type of design that you use. It is common to use an initial 'overarching' question - that is then 'broken down' into more specific parts for the different design phases. If you were using qualitative multi-methods i.e. two qualitative phases - then it would be likely that just questions were asked.

Triangulation generally means trying to answer the same research question with two different methods, but note that the editors of the Journal of Mixed Methods Research have now requested that authors no longer use the term triangulation, because it has too many different meanings.

Can you say more about the purpose that each of your methods will serve, and how they will be related to each other?

@David L Morgan, The work is on political violence and how it affects women's participation in election in Nigeria. I adopted about five main Research Questions but I intend using questionnaires to generate primary data, and supplement it with few In-depth interviews and two FGDs. Since it seems to many that using questionnaires mainly applies to Quantitative studies, while IDI, KII and FGD applies to Qualitative studies, I don't know whether I have to state my HYPOTHESES in addition to the Research Questions already provided, OR I should just go with the research questions even though it is both a qualitative and quantitative research.

The number of respondents I intend to distribute questionnaires on are 200 to 300 of them (all women), in a given State in Nigeria where the social fact of political violence appears to be alarming in recent years. I will support it with about 20 IDI and KII in a total form.

As I stated before, I don't know if only Research Questions will be okay or I should also state the Hypotheses.

For survey research, it is traditional (but not required) to state your research questions in terms of hypotheses. The most common way to do this is first to specify independent variables and dependent variables and then to state the relationship between them.

For the qualitative portion of the project, it would help to have a clear goal for the data you collect at that point. One possibility is an "explanatory sequential" design where you first determine the results from the survey, and then design the qualitative research to help you better understand the quantitative results. In that case, you would define your research questions for the qualitative portion of the study after you completed the quantitative portion.

Many researchers are confused between qualitative and quantitative research.It is very simple.When one is doing a qualitative research,one will do more of an exploratory research where data will be collected with personal interview and the analysed and summarised with a content analysis or what we call the qualitative data analysis with softwares like NVIVO or ATlas i.

When one is doing a descriptive or causal research one uses quantitative research where the survey technique is used and data is analysed with statistical tools.Now when do we mix these techniques.Sometimes we study an influence of various factors on a certain variable say stress,so we first do a qualitative research from samples and thru open ended questions list the major factors.Then we take another sample and test quantitatively if these factors(which came out as a result of the qualitative research) are prevalent in a certain population say Indians.This will be done thru quantitaive techniques by collecting data thru survey and analysing with the help of statistical techniques.