The whole idea of this type of research is to produce enough responses so that the Client can analyse the data in a number of different ways. All responses are sorted into subgroups, for example by Gender, Age, Race, Education, Income and so forth. The aim here is to identify the most preferred subgroup – so that future advertising and marketing can be tailored towards them.
At no point are the responses from a given person can be seen, or in fact, useful to the Client. It is of no benefit to know if you like product X, they need to know what percentage of the population likes product X.