But the raters predicted the donor's level of extroversion and neuroticism through smell about as accurately as participants in a different study predicted personality traits based on a video depicting a person's behavior, Sorokowska said. Judgments of dominance were most accurate in the case where an individual rater was assessing the odor of someone who was the opposite sex, suggesting such judgments are especially important when it comes to choosing a mate, the researchers said.
— Another "smell this sweaty t-shirt" study. Read more at Some Personality Traits Affect How You Smell at Live Science. Hat tip to Erin!