biased ARTICLE and PAPER: "Here's how to read someone's personality by their online profile picture"

http://metro.co.uk/2016/05/28/heres-how-to-read-someones-personality-by-their-online-profile-picture-5910095/

A recent study "Analyzing Personality through Social Media Profile Picture Choice", published in the AAAI (Association for the Advancement of Artificial Intelligence ) Digital Library, combined thousands of Twitter pictures with personality analyses
https://sites.sas.upenn.edu/sites/default/files/danielpr/files/persimages16icwsm.pdf
but .... unfortunately the Big Five normative personality test is obsolete, it has been proven as an incomplete and incorrect model of personality. The HEXACO (a.k.a. Big Six) is another oversimplification.  Online Dating sites have very big databases, in the range of 20,000,000 (twenty million) profiles, so the Big Five model or the HEXACO model are not enough for predictive purposes. That is why I suggest the 16PF5 test instead and another method to calculate similarity.
The Big Five normative personality test is the biggest mistake Psychologists made since several years ago.
The Big Five is also known as the Five Factor Model theory of personality traits, a psychological model based on research by Paul Costa and Robert McCrae.
http://onlinedatingsoundbarrier.blogspot.com.ar/2016/04/new-book-personlichkeit-auf-der-suche.html
 
Please see:
Artificial intelligence: Can Watson save IBM?
http://onlinedatingsoundbarrier.blogspot.com.ar/2016/01/artificial-intelligence-can-watson-save.html

Personality-Based Recommendations: Evidence from Amazon
http://onlinedatingsoundbarrier.blogspot.com.ar/2015/09/personality-based-recommendations.html

IBM will analyze Twitter data and turn it into something actionable for the enterprise.
http://vator.tv/news/2014-10-29-twitter-teams-with-ibm-for-business-analytics

IBM Deciphers Personality Types From 200 Tweets ?
http://onlinedatingsoundbarrier.blogspot.com.ar/2013/11/ibm-deciphers-personality-types-from.html

PAPER System U: Automatically Deriving Personality Traits from Social Media for People Recommendation
http://onlinedatingsoundbarrier.blogspot.com.ar/2014/10/paper-system-u-automatically-deriving.html

  
PAPER Predicting personality traits related to consumer behavior using SNS analysis
http://onlinedatingsoundbarrier.blogspot.com.ar/2016/04/paper-predicting-personality-traits.html

All normative tests like Big Five, HEXACO, 16PF5 or similar like 15FQ+ to assess/measure personality should be used with the correct norm.
You should have the norm for each country where you operate
and
You should use the norm for each country where you operate.
http://onlinedatingsoundbarrier.blogspot.com.ar/2016/05/elitesingles-usa-redesign-went-green.html