6.1 Quantitative, Qualitative, and Pluralistic Research

6.1.1 Categories of Research

1. Quantitative research（定量研究）: research involving the use of structured questions in which response options have been predetermined and a large number of respondents involved

2. Qualitative research（定性研究）: research involving collecting, analyzing, and interpreting data by observing what people do and say

3. Pluralistic research（复合研究）: combination of both quantitative and qualitative research methods in order to gain the advantages of both

6.1.2 the differences between qualitative and quantitative research

定性调研是定量调研的基础，它会帮助调研人员对研究问题获得相关资料，为后续定量调研提供研究框架。

定性调研在定量调研之后，可以帮助理解定量调研的结果。