Why All the Hullabaloo Over Handshakes? They Matter

A public meeting of two heads of state is almost always carefully choreographed. It's supposed to convey a mutual respect, a get-together of two equals on common and even ground. The public handshake is a standard part of that.

The Macron-Trump handshake was anything but.

"The research I've done in the lab, and observations that we've made, seem to indicate that the best handshakes ... have this mutual aspect to them," Bernieri says. "A coordination, a synchronicity, a similarity."

In a "good" handshake, hands are supposed to approach at the same speed. They meet at the same level and at the same distance from the body. The hands slip seamlessly into each other, stopping at the web between the index finger and the thumb. There's a squeeze, equal in strength and duration from each party.

But Trump — who has gone off the handshaking rails, too, with Canada's Justin Trudeau and Japan's Shinzo Abe, for two — grabs and pulls his partner toward him, whether it's a Supreme Court justice or a head of state. He sometimes holds on too long. He generally makes the entire ritual uncomfortable. That is, when he's not ignoring it altogether (as he did with Germany's Angela Merkel).

It's hardly statesmanlike. It's completely un-politicianlike.

And that's OK to many who would point out that being un-politicianlike was a major reason he was elected in the first place.

The motivation behind Trump's handshake strategy seems simple enough.

"What I suspect is happening is President Trump is communicating that he is a man to be reckoned with, and he's got all the chips," Bernieri says. "I think he's up front with that."

The handshake is a fascinating social interaction that has not been, Bernieri says, studied nearly enough. But the few studies out there agree that the handshake is not trivial. A handshake, scientifically and socially speaking, means something.

The studies, summarized in a 2011 paper done by Bernieri and OSU colleague Kristen Petty, find that handshakes:

And the thing is, everybody knows all this. So the Trump-Macron gripoff in Brussels prompted endless analysis around the world and a perhaps startling revelation from one of the participants that all that scrutiny was indeed merited.

"It's not innocent," Macron told a French newspaper. "We must show that we will not make small concessions, even symbolic ones ..."

After all the analysis, some declared Macron the winner of The Handshake. He offered at least as strong a grip as Trump, and perhaps more. He stuck with Trump. In fact, those close-ups even seemed to show that Trump attempted to break the grip first.

Macron more than held his own later when they met again at NATO headquarters, though more tugging and pulling was evident. Macron even left Trump temporarily waiting while he shook hands and embraced other world leaders first.

This elaborate dance of the handshake, to many observers all over the world, had another side. Trump v. Macron was, in its strange, testosterone-laced, power-trippy way, funny. Seeing two world leaders mangling such a common social gesture, on such a public stage, was ridiculous.

And now, every time Trump reaches out (and it's true of Macron, too, who recently greeted Russia's Vladimir Putin in a handshake timed by the media), we'll all be watching.

"Other people are aware of this. It is so blatant that they are, in a sense, forming strategies to combat this," Bernieri says. "We can only hope this war escalates, because that would be hilarious."