Nfield CAPI offers various scenarios
The following examples are theoretical and meant to explain you the main differences.
1. Surveys without sampling points and without quota
Non-geographical distribution is defined and your interviewers can ask anybody and anywhere.
Example 1 without quota and sampling points actually means no table at all.
2. Surveys without sampling points and with quota
Non-geographical distribution is defined by sampling points, but please note that a quota frame can still be used for geographical distinction. The fieldwork is controlled through the total target
that is placed in the software.
the interviewers who live in different cities interview people who are randomly passing by
Example 2 with quota, but no sampling points
3. Surveys with sampling points and quota
Geographical locations with the targets as the sampling points (Amsterdam East, Amsterdam West, Amsterdam South) need to be uploaded first, and then a quota frame with sample characteristics (female, male) should be set up. The fieldwork should be controlled through sampling points
, not the total target. The sum of the sampling points targets is your total target, but having the total in the software does not help you control the fieldwork better.
a complex set-up used for international or national projects when a detailed distribution is needed
Example 3.1. with sampling points and quota, less items
Example 3.2. with sampling points and quota, more items
4. Sampling points with addresses and without quota
Sampling points comprises the full addresses
that your interviewers should visit. It’s important to note that one sampling point must contain at least one address, and that it is not possible to use addresses without sampling points.
researching a local issue or interviewing customers of a company
Example 4 with sampling points and without quota doesn’t contain any matrix table.