Which term refers to the quality of examining one's own thoughts?

The term that refers to the quality of examining one's own thoughts is "introspective." This term specifically captures the process of reflecting on one's inner thoughts, feelings, and motivations. Introspection involves a deep-seated examination of personal beliefs and mental processes, which allows individuals to gain insights into their own cognitive and emotional states.

While "reflective" also pertains to thinking carefully about something, it is broader and can refer to consideration of external subjects or experiences rather than focusing solely on internal thoughts. "Self-aware" relates to an individual's understanding of their own character, feelings, and motives, but it does not emphasize the active process of examining one's thoughts as much as introspection does. "Analytical" refers to breaking down complex information or concepts, but it does not specifically pertain to self-examination of thoughts. Thus, introspection is the most precise term to describe this quality.