The primary purpose of the research is to test the short-term effects of the consumption of beverages containing phytochemicals and caffeine on several aspects of cognitive performance.

Inclusion Criteria:

• Subjects should be older than 17 and under 50 years of age, self report of good health

Exclusion Criteria:

• Using any prescription medication including birth control;
• Report a history of any phschiatric condition;
• Report hypersinsitivity to caffeine;
• Have visual impairment that connot be corrected with glasses or contact lenses