In the Youngest experiment, both true age and predicted age are negatively correlated with self-rated confidence (true age: Pearson r = −0.218, p-value < 10 −8 , predicted age: Pearson r = −.246, p-value < 10 −10 ), showing that raters believe their guess is easier when encountering younger users.
as proven by the Opposite experiment, posts written by males can be selected such that they are perceived as written by females.