A user or customer panel is a database of contact information for people who have previously agreed to participate in upcoming surveys or studies. A particular organization can create its own panels from customer lists or a proprietary customer panel can be used.
Some commonly used companies for panels at the time this book was written include eRewards, Greenfield, Harris Interactive, ORC (Opinion Research Corporation), Synovate, and TNS/Research International.
Most panels allow anyone to join, but some are by invitation only so that they can avoid users who aspire to professional survey-taking for money. To join a panel, a user typically has to complete a profile with various details about themselves. ...