Social Engineering Blogs

Yes, people form first impressions quickly and make decisions about who they want to interact with or avoid, do business with or hire or date. Research shows that people can form first impressions of threat looking at someone’s face within the 39ms “Very first impressions. ”Bar, Moshe; Neta,Maital; Linz, Heather
Emotion, Vol 6(2), May 2006, Shows that for all judgments—attractiveness, likeability, trustworthiness, competence, and aggressiveness—increased exposure time did not significantly increase the correlations.

Also an interesting tidbit is that most people are not attracted to angry faces so it doesn’t give a good first impression but there are some people with high testosterone that are “rewarded” by that negative look