American functionalist psychology constituted an effort to model scientific psychology on the successes of English evolutionary theory. In part it was a response to the stagnation of Wundt's psychological research program, which had been grounded in German experimental physiology. In part it was an attempt to make psychology more appealing within the highly pragmatic American context and to facilitate the application of psychology to domains outside of the scientific laboratory. Applications of psychology that emerged from the functionalist ethos included child and developmental psychology, clinical psychology, psychological testing, and industrial/vocational psychology. Functionalism was also the ground within which behaviorism rooted and grew into the dominant form of psychology through the middle of the 20th century. (Contains 4 footnotes and 1 figure.)