| • |
|
| • |
Stratification
- Regions/4 Nielsen Areas
- City-size
|
| • |
Total
Number of Centres (100)
- Provincial capitals (70)
- Minor centres (30) |
| • |
| Interviewer Profile |
-
- |
N. 50 interviewers specialists
in motivational interviews
N. 550 interviewers specialists in quantitative
interviews |
|
| • |
Type
of interview
- Face to face
- CAPI
- CATI
- CAWI |
| • |
| Checks performed: |
| - |
Cleaning of questionnaire |
| - |
Telephone check on 25% of the
sample for each study |
| - |
Spot accompanying of the interviewer |
|
| • |
Interviewer
replacement
- Annual average 8% |
| • |
Interviewer
training
- 1 day of training per quarter
- Personalized briefing |
