Jiang and Pell saw event-related potentials – positive peaks in brain activity – in all the volunteers' EEGs around 200 milliseconds after the start of a clip, no matter its confidence level. However, more confident speech had higher peaks than unconfident speech. A higher peak within such event-related potentials has previously been associated with increased processing of information. Nearly-confident voices seem to be given additional consideration with an extra pattern of brain activity occurring at about 330 milliseconds....This suggests that an important element of Game is likely to be voice-coaching. It ties in very closely with the known speed with which women decide if men are filed into the Yes, No, and Maybe categories.
When subsequently asked to score the recordings for confidence, female participants gave more extreme scores for confident and unconfident voices than did their male counterparts. This may mean females have a stronger ability to judge vocal confidence, suggests Jiang.
The EEG readings supported this theory. When played neutral-sounding statements, females showed additional sustained increases in brain activity around 1000 milliseconds after the start of the speech – a pattern that has previously been shown to occur when making judgements incorporating extra information. It suggests women may use additional, pragmatic knowledge to inform their decision on a speaker's confidence, says Jiang.
"There is substantial evidence already that women are better at detecting nonverbal cues that are subtle or that are presented outside the focus of attention," says Schirmer. Sex chromosomes and hormones appear to have a role in this, but the full reason is uncertain.
It also explains the supreme importance of irrational confidence as well as why women find arrogance so attractive. When a man is confident enough to openly display arrogance, you can hear that confidence in his voice. And it shows why faking it doesn't tend to work very well; put on whatever act you like, but if there is a tremor in your voice, women will hear it and judge you accordingly.