Coffee decoy effect (IMAGE) Smithsonian Tropical Research Institute Caption Humans can be fooled into making irrational choices, by adding a third choice between two extremes. Credit Smithsonian Tropical Research Institute Usage Restrictions For use with this release and related stories License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.