The clearly visible design differences between qualitative and quantitative research are: qualitative research involves words, images or objects; Quantitative involves data in the form of numbers and statistics. The researcher uses in-depth interviews in qualitative research to discover how subjects perceive their world. In quantitative research, the researcher uses specific measurements to predict hypotheses. In qualitative research, the researcher changes the subject's environment and uses these in-depth questionnaires to uncover different attitudes toward the world we live in. Quantitative can be personal, such as periodic visits with researchers to analyze symptoms and record data. Qualitative and quantitative aspects may overlap in the in-depth interview process in quantitative research aimed at recording data and testing subjects' symptoms. The two designs may overlap, but ultimately there are differences such as numerical data collection and statistics that will always be at odds. I will always disagree with the statement that quantitative research is impersonal since experience is the best knowledge to know that this is not true, even though at first glance, quantitative research seems impersonal because it allows one to obtain raw data. It starts first with the interview in both methods. Then it progresses and branches off towards two very different methods. The human quality is present throughout the study of quantitative research, even if you have to impute data to the system on a daily basis. When you meet the researchers periodically, you are reminded of the human quality. In all research, researchers care about their subjects, even professionally. In conclusion, here are the definitive differences between the two methods that are most recognized: the quantitative method first involves a clearly stated theory and hypothesis at the beginning, qualitative methods do not formulate a hypothesis until the end of the study . Second, the quantitative method involves manipulation and control. An example of manipulation is the drug whose control is the placebo. The drug is the instrument on which you are experimented on, the data you provide is analyzed, and a theory or hypothesis is argued for. Then the data is reduced to abstract statistics that statisticians can understand. Second, in comparison, qualitative research ends with the hypothesis, involves the emergence and representation of the world through the eyes of the subject, the researcher modifies the subject's environment so that he or she can observe how the subject reacts d 'in some way the researcher measures emotional responses and is directly involved in the research as an accomplice or impartial observer.