You don't want bias to skew your survey responses. Though at the same time you're not looking for a complex and expensive solution where you'll have to run several surveys at the same time and somehow combine the data afterwards. With SurveyTalent you'll be able to randomly assign respondents to specific questions and pages in your survey. A simple yet effective way to eliminate bias and to AB test your surveys.
Every respondent in SurveyTalent is randomly assigned to several groups. You can use those groups to show and hide questions, skip pages and even display custom thank you messages and send specific emails. Assignment details are available in the logic builder and the filter builder.