For the last several years he has studied the relationship between people’s use of everyday language and their personality and social behaviors. The developer of the text analysis program LIWC, he and his students are discovering that the most forgettable words in most any language (e.g., pronouns, articles, prepositions) can detect people’s motivations, intentions, emotions, and thinking styles. More recently, he is overseeing Project 2021, a university-sponsored initiative to transform the future of undergraduate education. Author of 10 books and over 300 scientific articles, Pennebaker is among the most cited social scientists in the world.