help guide my decisions?” Options include: Strongly Agree, Slightly Agree, No Opinion, Slightly Disagree, and Strongly Disagree.

### Personality

is determined on five axes—Openness, Conscientiousness, Extroversion, Agreeableness, and Neurotocism—by a survey. Users answer 20-300 questions which are used to score each personality component on a scale of 1-5. There is a large body of research showing that five factor analysis is explanatory for behavior [@digman1990personality], and its measurement is reproducible [@mccrae1987validation]. That work is now adapting to larger datasets collected online [@kosinski2015facebook].

### Sensational Interests

include Militarism, Violent-Occult, Intellectual Recreation, Occult Credulousness, and Wholesome activities. Users can indicate “Great Dislike”, “Slight Dislike”, “No Opinion”, “Slight Interest”, and “Great Interest” for 28 different items including: “Drugs”, “Paganism”, “Philosophy”, “Survivalism”, and “Vampires and Wolves”. Interest levels are calculated by summing responses from relevant items. The full calculation can be found in [@egan1999sensational].

### IQ

is determined by 20 questions that conform to Raven’s Standard Progressive Matrices. The development and validation of these questions is explained in [@IQkosinski] and [@kosinski2014measurement]. Because performance on IQ tests has been rising at roughly 0.3 points a year over the past century and IQ is defined as mean 100, the scoring of a test is properly defined 