We’ve all heard of love at first sight, but according to a collection of studies, friendships can be forged within moments of meeting, too.

Kelly Campbell, a psychology professor at California State University, San Bernardino, lead a study about “friendship chemistry” to find out what causes two strangers to instantly bond while others to remain impartial. “When you first see the person, you don’t realise how many judgments you’re making, but you’re actually gathering information that’s telling you if this person fills those needs for you,” she told New York Magazine.

So what are you subconsciously looking for when you meet a potential friend? “We care about someone who’s going to be fun, that we can enjoy ourselves with … You need emotional support, social support, you want then to be loyal and trustworthy, you don’t want to feel judged,” she says. One study found that it can take as little as one-tenth of a second to form a first impression, but if it’s positive, you could be more open to building a stronger friendship with that person.

The main drawback?  Like trusting you’ll instantly know when you’ve met your S.O., putting blind faith in friendship at first sight could be a hindrance.  Michael Sunnafrank, a communications professor at the University of Minnesota notes, “If you expect [the relationship] not to develop, you’re going to make it not develop. If you expect that it’s going to be positive, you’re more likely to act positively and make it turn in that direction.”

Did you and your best friend “click” the first time you met?