See my response to minimaxir above about additional documentation coming soon, and a link with good background info on the technology. Meanwhile, here are brief descriptions of the Big 5 Personality traits: Big 5 Personality: - Openness - associated with curiosity, intellect, and an appreciation for art and adventure - Conscientiousness - associated with organization and industriousness - Extraversion - associated with positive and outgoing attitudes toward other people - Agreeableness - associated with compassion and cooperation toward other people - Emotional Range - associated with a sensitivity to negative emotions

For more information on systematic associations between personality and individual differences in word use, please refer to studies like Tal Yarkoni, "Personality in 100,000 words: A Large scale analysis of personality and word use among bloggers", 2010