Personality traits and self-presentation at Facebook

•Extraversion was a positive predictor of photo uploads, status updates, and number of friends at FB Wall.•Narcissism was a positive predictor of status update at FB Wall.•Extraversion was a positive predictor of Like, Comment, and Share at FB News Feed.•Openness was a negative predictor of clicking Share at FB News Feed.•Conscientiousness was a negative predictor of writing Comment at FB News Feed.