Herron Associates, Inc. has been gathering opinions of Indiana residents for more nearly 50 years over the phone, in the mall, and at their facilities. Studies are conducted on various topics and may include consumer products, lifestyle and activities, personal viewpoints on politics, or business products and services. Members of their database are periodically contacted to determine if they meet the criteria set for participation in a specific research study. Those meeting the criteria are invited to participate in a study held at one of their facilities or a designated location. Participants receive money when they fulfill their participation requirements, typically before they leave the facility.
http://www.herron-research.com/research/participation/