Final answer:
During a conversation about a recent vacation, both bottom-up and top-down processing play a part in understanding.
Step-by-step explanation:
During a conversation about a recent vacation, both bottom-up and top-down processing can play a part in your understanding. Bottom-up processing occurs when you perceive new information from your senses and then interpret it.
For example, if your friend mentions that they saw a beautiful sunset during their vacation, you would use your sensory information to visualize and understand what they are describing. On the other hand, top-down processing involves using your previous experiences and expectations to recognize and understand the conversation. For instance, if your friend says they went hiking in the mountains, and you have been hiking before, you can use your prior knowledge and experiences to relate to their story.