Why people replay conversations in their head, according to psychology

You leave a conversation and, hours later, your mind is still there. You remember the exact sentence you said. Then the pause that followed. The expression on the other person’s face. You wonder whether your joke landed, whether you sounded too eager, too distant or simply awkward. Sometimes the conversation was completely ordinary, yet the brain keeps returning to it as if there is something left to solve.It is easy to call this “overthinking”. But psychology suggests that, at least in some situations, repeatedly going over a social interaction may reflect something more specific: an attempt to make sense of uncertainty.Social interactions are full of information we cannot directly access. We can hear what another person says, observe their expressions and notice their behaviour, but we cannot know exactly what they were thinking or how they interpreted us.