The student in the photo is participating in an experiment designed to teach subjects to associate names with the voices of ten different talkers. The subject hears a word produced by one of ten talkers and then presses a button, labeled with the talker's name, indicating which speaker the subject thinks he has heard. After a response, subjects receive feedback indicating whether their answer was correct or not. This training was part of a larger project to determine the effects of familiarity with a talker's voice on the perception of speech.