Step 1: Introduce the Big Five personality model.
Psychologists use the Big Five model (often remembered as OCEAN) to describe the five broad dimensions of human personality. Each letter stands for one parameter.
Step 2: List the five official parameters.
O = Openness to experience, C = Conscientiousness (sometimes written as Consciousness in textbooks), E = Extraversion, A = Agreeableness, N = Neuroticism.
Step 3: Verify Consciousness (Conscientiousness).
Yes, Conscientiousness is the official parameter representing organisation, dependability, and goal-directed behaviour.
Step 4: Verify Openness.
Yes, Openness is a full parameter reflecting creativity, curiosity, and willingness to try new experiences.
Step 5: Verify Neuroticism.
Yes, Neuroticism is a proper OCEAN parameter reflecting the tendency to feel negative emotions like anxiety and moodiness.
Step 6: Evaluate Introversion.
Introversion is one end of the Extraversion scale, not a separate parameter in its own right. The official parameter is Extraversion. Since Introversion is not one of the five named parameters, it does not belong to the Big Five directly.
\[ \boxed{ \text{(D) Introversion} } \]