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The situation described is an example of Generalization. Here's why:
1. Generalization occurs when a response learned in one situation occurs in other, similar situations. In this case, the person who got food poisoning at one fast-food restaurant now avoids eating at all fast-food chains, even though they were only sick at one specific place.
2. By associating the negative experience of food poisoning with fast-food chains in general, the person has generalized their fear or avoidance to all similar settings, rather than discriminating between different fast-food restaurants.
3. This behavior shows a generalization of fear or avoidance based on a past negative experience, which is characteristic of the generalization process in conditioning.
Therefore, the example provided fits best with the concept of Generalization.