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Welcome to the myPersonality Project Website

This wiki was established to share the data with researchers. Go HERE if you want to take a psychological test, or visit Apply Magic Sauce, to predict your personality from your Facebook Likes.


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myPersonality was a popular Facebook application that allowed users to take real psychometric tests, and allowed us to record (with consent!) their psychological and Facebook profiles. Currently, our database contains more than 6,000,000 test results, together with more than 4,000,000 individual Facebook profiles. Our respondents come from various age groups, backgrounds, and cultures. They are highly motivated to answer honestly and carefully, as the only gratification that they receive for their participation is feedback on their results.

A wide variety of data is available to the registered collaborators, including:

  • Psychometric tests' scores
  • Records of users' Facebook profiles
  • Item-level data

You will find more details about the available data in the Download Databases section. To make your life easier, we preprocess most of the data. We calculate scores, recode variables, remove invalid records, anonymize results, etc. Note that not all of recorded (or potentially recordable) variables are currently available (let us know if you need something to be added). If you need help, or want to clarify or elaborate on something, please write to:

Good luck with your research!

David Stillwell & Michal Kosinski

myPersonality in numbers

(Updated October 2015)

  • Nearly 7.5m people have completed a questionnaire.
  • Users could retake myPersonality tests, giving us longitudinal data. The Big 5 test was RETAKEN over 900,000 times.
  • Users could rate the personalities of their FB friends. There are over 300,000 friend ratings.
  • About 40% of users gave us access to the data on their FB profiles…
  • This includes their preferences, as expressed by FB Likes. We have more than 36,000,000 user-like pairs. See examples of this data in action: PreferenceTool and Apply Magic Sauce.
  • There were more than 25 different questionnaires available through myPersonality.
  • More than 40 countries have had 1,000 or more participants, but myPersonality was only available in English.
  • Over 200 researchers are currently working with myPersonality data.
  • myPersonality was set up in June 2007 and closed in 2012.


myPersonality started out in June 2007 as David's personal side project, between finishing undergraduate studies and beginning postgraduate studies. After becoming popular, it was only then that we considered its research possibilities. David's PhD research, which was already proposed in February 2007, is in the area of decision-making. This is why myPersonality has close academic links; however, it is a standalone business.

Are you nuts? Serious research using data from Facebook?

First, read this...

And what the heck is this Facebook?! Well, nearly 50% of the population in quite a few countries are “on Facebook.” This includes 98% of students in the UK and quite possibly your grandma too… she just hasn't added you as a friend! As always, though, there are drawbacks:

  1. People might be less motivated, more playful, and distracted (however, they are also in their natural environment; we implement a series of psychometric methods aimed at detecting questionnaires submitted by inattentive or otherwise randomly responding individuals; and we show that we have the same amount or more valid data than in traditional pen-and-paper questionnaires).
  2. Repeated participation (but we remove repeated protocols or use them in test-retest studies).
  3. Language incompetence of international audiences (but one can detect this in a similar way to how you detect randomly responding participants—also, easy access to an international audience is a great advantage).
  4. Sample bias due to the Facebook environment (but on the other hand, even if some groups are underrepresented, you will still find plenty among our 5.5 m—and growing—users).
  5. Self-enhancement or scores influenced by friends in another way. (But users can choose to make any of their scores private and some of the most personal questionnaires cannot be shared even if one wishes. It might be that filling out a questionnaire on your own computer at home is much more private than in the lab or wherever else.)
  6. Fake FB profiles (happens very rarely and really easy to spot (e.g. by looking at network properties). Profile information is also “verified” by an individual's social circle—it is hard to lie to the people that know you best. Moreover, we do not scare people away (unlike other psychologists) by asking personal questions. Instead, we just ask if we can record their profile. Lastly, there is no pressure; one does not have to share their profile info (users must opt in), and thus we avoid the deliberate faking of the data.
  7. Technical problems (but still less dangerous than entering data “by hand,” and dozens of people use this data, which helps to detect and remove mistakes).
  8. Anything else that comes to your mind? Add it here!

What we are talking about

start.txt · Last modified: 2016/08/19 17:04 by Michal Kosinski