Final answer:
The statement that self-concept is unrelated to consumption behavior is FALSE. Self-concept profoundly influences consumption behavior, as individuals often choose products that reflect their self-identity or aspirations.
Step-by-step explanation:
The question "One's self-concept is typically unrelated to his/her consumption behavior" is FALSE. Self-concept is closely tied to one's consumption behavior. This is because our purchase decisions and the brands we associate with often reflect how we see ourselves and how we want to be perceived by others. For instance, Carl Rogers, a humanistic theorist, talked about the importance of self-concept, which is our thoughts and feelings about ourselves, and how it divides into the ideal self and the real self. If there's a high congruence between these two, it indicates a healthy and productive life.
Consumption patterns can be a way for individuals to express their self-concept; choosing products that align with their self-identity or aspire to their ideal self. This concept is further supported by the Thomas theorem, which states that the subjective construction of reality influences behavior. Thus, our consumption choices often align with how we define ourselves and how we want to be seen, challenging the traditional consumer theory which often ignores the influence of self-concept on consumer behavior.