Professor Otis discussed the results of a qualitative study investigating individual differences in the experience of thought. She interviewed thirty-four scientists, engineers, novelists, poets, artists, and other creative professionals with the aim of learning how they vary in their mental use of words and images. To a large degree, the felt experience of conscious thought remains hidden. Everyone thinks, but what goes on in other people’s heads remains a mystery. In her talk, Dr. Otis shared the intuitions of her creative participants and talked about their relevance to scientific and literary knowledge.