Although you plan to do quantitative research, you'd better read some classic papers about qualitative research first when you lay the foundation in the early stage, so that you can compare the qualitative research and quantitative research in the early stage and summarize the similarities and differences, which is more conducive to your subsequent quantitative research.

Quantitative research is generally carried out in order to obtain the statistical results of specific research objects. Qualitative research has the characteristics of exploration, diagnosis and prediction. It does not pursue accurate conclusions, but only understands problems, finds out the situation and obtains perceptual knowledge. The main methods of qualitative research are: group interviews with several people, in-depth interviews that need detailed answers, and various projection techniques. In quantitative research, information is represented by some number. When processing and analyzing these figures, we must first make clear on what scale these information materials are measured and processed. Stevens divided the scale into four types, namely nominal scale, sequential scale, interval scale and proportional scale.