Which term describes the behavior of making purchases based on familiarity without extensive thought?

The term that accurately describes the behavior of making purchases based on familiarity without extensive thought is routinized choice behavior. This occurs when consumers repeatedly buy the same brand or product out of habit or because they are comfortable with it, rather than engaging in a detailed evaluation of alternatives. It reflects a low level of involvement and decision-making effort, as the consumer has already established a preference and doesn't need to reconsider their options frequently.

In contrast, limited decision making involves more thought and consideration than routinized choice behavior. Impulse buying refers to spontaneous purchases made on a whim, often without prior planning or consideration. Loyalty decision emphasizes the commitment to a brand or product but may involve a more conscious evaluation of why that choice is made, thus differing from the automatic nature of routinized choice behavior.