Which type of consumer problem solving is typically used when a consumer already has a large amount of experience in how to meet a specific need and does not require additional information? Routinized response behavior, unthinking problem solving, limited problem solving, rational problem solving and extensive problem solving.

The type of consumer problem-solving typically used when a consumer already has a large amount of experience in how to meet a specific need and does not require additional information is called "Routinized Response Behavior". Routinized response behavior occurs when purchasing decisions are made out of habit because the consumer has previous experience with the product or service and is satisfied with it. The decision-making process is almost automatic and involves very little effort or research.

Consumer problem-solving processes can be categorized into different levels based on the amount of time and effort a consumer invests in searching for and evaluating information before making a purchase decision.

1. Routinized Response Behavior: This behavior is common when a consumer is purchasing everyday goods or services that they are familiar with and have bought before, like a favorite brand of toothpaste or a go-to breakfast cereal. The decision is quick and requires minimal time and effort.

2. Limited Problem Solving: When consumers are somewhat familiar with the product category but not fully informed about their options, they engage in limited problem solving. Here, they make comparisons between brands or products based on a few criteria that are important to them, but they do not conduct an extensive search or evaluation.

3. Extensive Problem Solving: This is used for infrequent, high-risk, or expensive purchases. Consumers typically have little to no previous experience with the product, so they actively seek information, consider a wide range of alternatives, evaluate the pros and cons of each, and then make a decision. Buying a car or choosing a college are examples that might involve extensive problem solving.

4. Unthinking Problem Solving: Although not a commonly used term in consumer behavior literature, it implies a habitual or automatic type of decision making that does not involve conscious thought. It is similar to routinized response behavior but with even less cognitive engagement.

5. Rational Problem Solving: This is a highly cognitive and logical approach where the consumer methodically goes through various steps, carefully evaluating the features and benefits of the products, to make a well-informed decision.

Understanding these behaviors is important for marketers since it helps them to design more effective marketing strategies. For instance, if a product is often bought through routinized response behavior, marketers might focus on making sure their product is easily accessible and might rely heavily on reminding advertisements instead of informational advertisements.