The Two Most Important Contributions of Titchener's System to Modern

Multiple Choice

The two most important contributions of Titchener's system to modern psychology are ____.​

A) ​his version of introspection and the experimental method
B) his experimental method and a strong position to protest
C) ​the delineation of a single dimension of affect and the identification of three (not two) elements of consciousness
D) facilitating the transition from a focus on self-report to a focus on the objective observation of behavior and insisting on pure research
E) the insistence on pure research and the focus on normal individuals as subjects