“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.”

“An Unprejudiced Mind,” p. 317
Pretexts: Reflections on Literature and Morality (1964)

Benway
Naked Lunch (1959)

Sonshi interview

Source: "A history of introspection." 1953, p. 172 ; Cited in: Kurt Danziger, "The history of introspection reconsidered." Journal of the History of the Behavioral Sciences 16.3 (1980): 241-262.

Source: One Writer's Beginnings

Nobel lecture (1981)
Context: Cognitive introspective psychology and related cognitive science can no longer be ignored experimentally, or written off as "a science of epiphenomena", nor either as something that must, in principle, reduce eventually to neurophysiology. The events of inner experience, as emergent properties of brain processes, become themselves explanatory causal constructs in their own right, interacting at their own level with their own laws and dynamics. The whole world of inner experience (the world of the humanities) long rejected by 20th century scientific materialism, thus becomes recognized and included within the domain of science.

Kurt Danziger, "Wundt's psychological experiment in the light of his philosophy of science." Psychological Research 42.1-2 (1980). p. 109; Summary

August 1932 Henry and June
Diary entries (1914 - 1974)

Travis Parker, Chapter 4, p. 54
2000s, The Choice (2007)