Final answer:
The term that does not describe the assumption behind Carl Rogers's self theory is Extraversion. Option E is correct answer.
Step-by-step explanation:
The term that does not describe the assumption behind Carl Rogers's self theory is Extraversion. Carl Rogers's self theory focuses on the individual's self-concept and the need for congruence between the real self and the ideal self.
The assumptions behind his theory include unconditional positive regard, congruency, self-actualization, and empathic understanding. However, extraversion is not directly related to Rogers's self theory.
So Option E is correct