The severe restrictions which Wundt placed on introspection also manifest themselves in the types of judgment that his experimental subjects were req… - Kurt Danziger

Newtonian studies are not part of physics but belong to an altogether different discipline, the history of science.

History is not the arena in which natural scientists look for the truth; quite the contrary, they believe it cannot be found there but rather in the laboratory. From their point of view history will at best yield up stale truths that have been superseded.

The term “introspective psychology” is misleading in that it covers a variety of diverging positions on the theory and practice of introspection. From the beginning there was a basic discrepancy between the British and the German philosophic tradition, the former relying more exclusively on introspection than the latter. Wilhelm Wundt’s advocacy and use of introspection was extremely circumscribed and essentially limited to simple judgments tied to external stimulation. During the first decade of the twentieth century some experimental psychologists, notably E. B. Titchener and the , greatly enlarged the scope of introspection, ushering in the brief vogue of “systematic introspection.” The latter never gained wide support in North America and was supplanted in Germany by developments that do not constitute “introspective psychology” in any precise sense.