According to a thesis published in Journal of Psychopharmacology moderate drinking helps improve the fluency of foreign languages. To test the impact of alcohol on foreign language proficiency, researchers at the University of Maastricht in the Netherlands recruited 50 German students, and the University of Maastricht, near the German border, drew German students closer to school, which needed to be tested in Dutch before enrolling. The researchers first asked students to drink 250 ml of cold water or 250 ml of bitter lemonade, or enough vodka to produce moderate levels of blood alcohol. 15 minutes later, the students debated in Dutch, and two people who did not know who was drinking and who drank water were graded according to their comprehension, vocabulary, pronunciation, vocabulary selection and fluency. The results show that the Dutch language proficiency of drinkers seems to have improved. The researchers say the findings require further research.