Not who you're looking for? Others named Mary Whiton Calkins: American philosopher and psychologist (1863–1930)
“All psychologists would agree to define their subject, at least in an introductory way, as the science of consciousness. But this definition is not enlightening unless its terms are thoroughly understood, and we must at once, therefore, proceed to discuss the nature of a science.”
Quotes via Wikiquote (CC BY-SA), each with its original source.