Combinations of words and odors. (IMAGE) University of Tokyo Caption The four different odors and their labels were chosen based on a pilot study which checked that participants would see them as matching up. In this final study, 20 participants aged 20-39 years old rated the level of similarity and difference. Credit 2024 Okumura et al./ Human Brain Mapping Usage Restrictions Credit must be given to the creator. No derivatives or adaptations of the work are permitted. License CC BY-ND 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.