Boring was under the impression that Titchener basically imported Wundt’s brand of experimental psychology, structuralism, to America, when in fact, Wundt’s systemm was quite different from Titchner’s system. So in his book, the distinctions were lost and since most physchologists trained in the 50s-80s learned their history through this book, the mythological identification of Wundt’s and Titchner’s systems became conventional wisdom.