Which psychological concept explains why a person might not notice a change in scenery during a conversation?

Change blindness is the psychological concept that describes the phenomenon where a person fails to notice significant changes in their visual environment, often because their attention is focused elsewhere. In the context of a conversation, when a person's attention is fully engaged with the speaker, they may not register changes in the surrounding scenery, such as moving objects or alterations in the environment. This occurs because the brain has limited attentional resources, and if those resources are directed towards processing conversation and maintaining engagement, it can overlook other details that might otherwise be obvious. Change blindness highlights how our perception is not a perfect reflection of reality but is instead influenced by where we direct our focus, leading to an experience where changes go unnoticed.