Voice Betrays Personality

In New Scientist:  As detected other people, not by machine.  And it is not clear what accuracy means here.  By what other measure?  " ... Although it's not clear how accurate such snap judgements are, what is apparent is that we all make them, and very quickly. "We were surprised by just how similar people's ratings were," says McAleer. Using a scale in which 0 represents no agreement on a perceived trait and 1 reflects complete agreement, all 10 traits scored on average 0.92 – meaning most people agreed very closely to what extent each voice represented each trait. ... "