According to cattell's 16pf self-report inventory, someone scoring near the "reserved" end of the "reserved/outgoing" dimension would be more than someone scoring in the middle or at the opposite end.

The answer is more "introverted" than someone

Explanation:

When a person is focusing more on internal thoughts and feelings and give no importance to external sources of thoughts or moods, that person is introverted. People can be introverts or extroverts but we mostly see that people are in between these two personality traits because these people are focusing on both internal and external sources of thoughts.