Raise your brows, close your eyes slowly: the tiny face moves that make you sound sure of yourself

It is not only what you say — it is what your eyebrows do while you say it. University of Glasgow researchers created computer-generated speakers who gave identical answers in identical voices, changing only the movements around their eyes and brows. Listeners from both Western European and East Asian cultures consistently read raised eyebrows and a brief, slow eye closure as confidence, while lowered brows and narrowed eyes read as doubt. 'Even when the words and vocal cues remain the same, changing the speaker's facial movements can alter how confident or doubtful their answers appear,' says lead researcher Dr Jonas Nölle. The study, in Proceedings of the Royal Society B, shows facial signals do not just accompany speech — they actively shape how it is understood.