Survey Methodology

Prince Market Research, an independent marketing research company, was commissioned to conduct a nationally representative telephone study with consumers in 20 major metropolitan areas in the U.S. to learn more about their use of caffeine in everyday beverages and food. All telephone calls were conducted between July 1 and Aug. 21, 2008, during which period, a total of 2,005 interviews, lasting between of five and seven minutes, were completed. No incentive was offered and the sponsor of the research was not revealed. The margin of error is +/- 2 percent.

Prince Market Research

Prince Market Research is a full-service research firm providing actionable, custom research solutions to businesses throughout the U.S. PMR specializes in customer satisfaction, brand strategy and new product/service research, helping companies from the Fortune 500 to small businesses hear and act on the voice of their customers through innovative qualitative and quantitative research methodologies. Learn more at www.PMResearch.com.