This classic psychological case study focuses on one talkative child’s emerging ability to use language, her capacity for understanding, for imagining, and for making inferences and solving problems. In wide-ranging essays, scholars offer multifaceted linguistic and psychological analyses of two-year-old Emily’s bedtime conversations with her parents and pre-sleep monologues, taped over a fifteen-month period. In a foreword written for this new edition, Emily, now an adult, reflects on the experience of having been a research subject without knowing it.