What are pre-screening questions?

Some surveys may require you to answer several questions before they can determine if you have the right profile for them. These are known as "pre-screening" questions and are a necessary part of the process for completing these paid surveys.
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Therefore, pre-qualifying questions will determine whether you are eligible for a survey. If you have been disqualified from a particular survey, it simply means that you do not fit the desired person profile. This can be for many reasons such as lifestyle, occupation, age, gender, etc.