Why being nice makes people take you less seriously

Partly because of a real quirk in how two judgments interact.

Charles Judd, Laurie James-Hawkins, Vincent Yzerbyt and Yoshihisa Kashima studied warmth and competence, the two dimensions most social judgment runs on. When people simply rate others on traits, the two often travel together: warm people get read as capable too. But when a target is experimentally pushed up on one dimension, the other tends to slide down. Across four studies they found this negative dynamic relationship, and they were explicit that it is moderated by circumstance rather than automatic.

So the thing you are noticing is documented, and it is a tendency rather than a rule. Which matters, because the trade it seems to offer (warmth or credibility, pick one) isn't the trade actually on the table.

Niceness operates on the message. Refusing contempt operates on what you attach to it.

Being nice usually means softening, shortening, or postponing the thing you came to say. The content shrinks so the moment stays pleasant, and that does cost you credibility, as it probably should, because something was withheld.

Refusing contempt leaves the message entirely intact. You say the whole difficult thing. What you decline to add is the verdict about the person: the sigh, the unbelievable, the suggestion that anyone who would do this isn't worth the conversation.

A test. I think you're wrong about this and I want to keep talking about it is not nice — it plants a flag and won't move — and there is no contempt in it anywhere. Fine, whatever you think is best is perfectly nice, and depending on how it's delivered may be nothing but contempt. Two dials. Most of us only ever learned about one.

Not the kind people usually mean.

Firmness is whether you hold the position. Edge is what you attach to the person while holding it. You can be completely immovable and completely neutral about someone's character. Negotiators do it for a living.

Alexander Czopp, Margo Monteith and Aimee Mark ran the direct test: hold the correction constant, vary the temperature. The behavioral result didn't move. What the sharp version bought was more anger at the person delivering it, charged to their account rather than anyone else's.

What reads as weakness is not the absence of edge. It's the absence of a position.

Related: Does being harsh make criticism more effective?

Some people do respond to it, and pretending otherwise would be dishonest.

Force works on compliance. It reliably gets someone to stop doing something in front of you, and when that is the entire goal — a stranger, a single transaction, something that has to end right now — it can be the correct instrument.

What it doesn't do is govern what happens when you're not in the room, which is most of the hours. It also teaches people to route around you rather than through you, which is why the same conversation tends to return wearing slightly different clothes.

If force is genuinely the only lever that moves a particular person, that's worth knowing about the relationship. It isn't a technique to get better at.