What are the advantages and disadvantages of the survey method and test marketing?

is someone not doing their homework? I'll give it a shot:

The advantages to the survey method are that you appeal to a larger audience. More people are willing to sit down and discuss their opinions rather than going through an actual testing demonstration. The disadvantage to this is that you have a more biased group. You aren't learning by trial and error.

The advantages to test marketing are that you have some people who are going to be more honest while doing this, rather than doing a survey. You see people's reactions and that may spark some more ideas for the product. The downfall to this is that some people may become hesitant and you're statistics may become flawed.