They claim that two have non-overlapping weaknesses and their strengths can actually be incorporated to give greater confidence in the accuracy of the research results (Onwuegbuzie & Leech, 2005).
Mixed Method Research utilizes both quantitative and qualitative research methods in a single study. At the start, it gathers both quantitative data and qualitative data in such a way that it is half of a quantitative plan and half of a qualitative plan. It then manipulates both data to produce a more powerful means to answer the statement of the problem. It is a way to combine the strengths of the two methods and minimize, if not eliminate, their weaknesses.
On the other hand, the fact that it uses two types of methods, more challenges are expected in the mixed methods strategy of inquiry. One of these challenges is that it requires more time and resources. Another is that it requires more than one researcher to conduct the experiments. It would be very difficult for a single person to conduct both the quantitative and qualitative researchers especially if these are to be done simultaneously. The above challenges are probably the biggest challenges for a researcher who wants to use a mixed methods strategy of inquiry.
Mixed Methods Research is best used in a research study wherein one method alone, quantitative or qualitative, will be inadequate to give a highly reliable result. It is used for the type of questions wherein one method can answer the research question and the other method can solidify the results. For instance, in the study of “Adolescent Alcohol Use: Mixed Methods Research”, interviews were used to support numerical surveys to strengthen the results (Newman, I., Shell, D., Ming, Q., Jianping, X., & Maas, M., 2006). Obviously, this kind of research question requires more than one method and thus requires Mixed Methods Research method.