Why the Last Words Come Back First
When someone finishes speaking, the final words are often still easy to repeat because they have not yet had much time to fade from working memory—the mind’s short-term workspace. For speech, one part of that workspace briefly holds sound patterns. You can keep them available by silently repeating them, much as you might rehearse a phone number before dialing.
This helps explain the recency effect: in a list, people often recall the most recently heard items better than items from the middle. Those middle items have had more time to fade or be displaced, while the ending is still fresh.
How an Interruption Changes the Recall
A new conversation or task can interfere with that brief sound trace. If you have to answer a question or switch topics, your attention is no longer rehearsing the words you just heard; new information may compete for the same short-term space. The ending can then become harder to repeat, even though you heard it only moments ago.
That does not mean the words were erased from memory altogether. It means the immediate route back to them has weakened, and recalling them may require more effort—or they may not come to mind. The practical difference is familiar: repeat the last instruction right away and it may come easily; pause to handle something else, and the exact wording can slip away.
