The Karpman triangle was an adaptation of a model that was originally conceived to analyze the play-action pass and the draw play in American football and later adapted as a way to analyze movie scripts. Karpman is reported to have doodled thirty or more diagram types before settling on the triangle. Karpman credits the movie Valley of the Dolls as being a testbed for refining the model into what Berne coined as the Karpman Drama Triangle.[1]