Final answer:
The concept of personality is most closely associated with behavioral consistency, which is supported by humanistic theories like those of Carl Rogers and by trait theories like the Five Factor Model.
Step-by-step explanation:
The concept of personality most clearly embodies the notion of behavioral consistency. Personality refers to the enduring traits and patterns that cause individuals to consistently think, feel, and behave in particular ways. Carl Rogers, a humanistic theorist, suggested that our personality is reflected in our self-concept, which is composed of our thoughts and feelings about ourselves. This includes the ideal self (who you would like to be) and the real self (who you actually are). Rogers emphasized the importance of achieving congruence, a state where the real self and ideal self are aligned, thus reflecting consistency in our behavior across time and situations. The Five Factor Model further supports the idea of consistency in personalities through factors like openness, conscientiousness, extroversion, agreeableness, and neuroticism.