The mood shifts. Conversations tilt without warning. That habit rarely grows at random. Psychology maps how it starts, why it sticks, and what it signals ...

Rumination: We’ve all done it. Perhaps an interaction with a friend has gone poorly and we are unable to stop replaying it in our mind. We imagine what we should have said, mentally review the entire ...

In boxing, fighters barely flinch at strong punches in the early rounds. But as time passes, their stamina depletes, the impact accumulates, and by the final rounds, even light jabs can shake them to ...