Info-China boasts 450 experienced and well-trained face-to-face interviewers in Beijing, Shanghai and Guangzhou. Furthermore, our network of 30 agencies located throughout China provides qualified local interviewers. Local agency interviewers that participate in Info-China projects have all received training on basic interview skills and related projects.
For door-to-door interviews, we sample on the basis of multilevel random sampling. Sampling covers at least 1% of local neighborhood committees and samples implemented in every neighborhood committee do not exceed 3% of total samples.
Checks of all procedures are put into practice independently by the Q.C. department or manager in charge of the project. Among these checks, sampling checks account for 20%, interview checks 40% (telephone and on-the-spot checks account for 20% respectively), and coding checks 30% (carried out by the manager in charge of the project).