From a recent study:

20% of smartphone behavior can be accounted for by WhatsApp usage, and females use it 13 minutes longer than males.

Extroversion is of high importance in understanding WhatsApp usage, extroverts use it longer vs introverts.

High neurotics tend to use Facebook more as it facilitates communication without face-to-face interaction.

On the other hand, conscientiousness is inversely correlated with WhatsApp usage. Conscientious humans handle their digital consumption better and are less prone to Internet addiction.

Are you conscientious? Conscientious humans can be described as punctual, and diligently follow their daily routines.



Status updates. Image source: WeBlogCartoons, Creative Commons license.

In related research, there was no good news for science uses of social media:

I Like, I Cite? Do Facebook Likes Predict the Impact of Scientific Work? http://buff.ly/1LPj4Io - Not really.

Impact of Social Media on Dissemination and Implementation of Clinical Practice Guidelines: Zero http://buff.ly/1LPj5fH

References:

Smartphone usage in the 21st century: who is active on WhatsApp? Christian Montag et al. BMC Res Notes. 2015; 8: 331.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4522968/