A thumbs-up emoji turns up four hours late at the bottom of a group chat that has already moved on. Someone announced a promotion that morning. Everybody else piled in with exclamation marks and offers of drinks, and one person went quiet, then produced the smallest acknowledgement a phone allows. The room notices.

That silence gets filed under jealousy almost every time. Usually it is something sadder and more specific than that.

What psychologists count when good news gets shared

There is a clinical word for telling someone your good news: capitalisation. Psychologist Shelly Gable and colleagues ran four studies published in the Journal of Personality and Social Psychology and found that sharing a positive event lifted daily wellbeing well beyond whatever the event itself delivered. The lift got bigger when the listener responded with active enthusiasm instead of a shrug.

Four replies are available to anyone handed a piece of good news. There is genuine delight, complete with follow-up questions. There is quiet, understated pleasure. There is the deflating response, the one that finds the catch (“sounds like a lot more hours, though”). And there is near-silence, a subject change, the conversational version of staring at your shoes.

Most people who struggle with someone else’s win live in the bottom two.

Why the flat reply is so targeted

Ask anyone who has been on the receiving end and they will tell you the flatness is selective. The same friend who whooped about a half-marathon time went oddly still about the book deal.

Abraham Tesser built a model around exactly that pattern. He and his co-authors set out the self-evaluation maintenance model in 1988, describing two processes that run at once. When a close friend outperforms you in an area you have staked your own identity on, comparison kicks in, and closeness makes it worse rather than better. When the domain means nothing to you, the opposite happens and you get to bask in their glory.

Being close to someone, on this account, raises the stakes in both directions. Their triumph in your field lands harder precisely because they are not a stranger.

The bit about never having been celebrated

Gordon Flett, a psychologist at York University in Toronto, has spent years on a feeling he calls anti-mattering: the sense of being invisible, insignificant, of having a voice nobody bothers to hear. His team built a five-item scale for it, and research published in Frontiers in Psychology ties higher anti-mattering scores to loneliness. A later study of high school students, published in the Journal of Psychoeducational Assessment, found that the trait clustered with a harsh self-view and higher rates of insecure attachment.

Which is where childhood arrives, carefully. A study of 101 dating couples in the Journal of Family Psychology recorded partners telling each other about a good thing that had happened. Trained observers watched the tapes. More avoidantly attached responders were rated as less responsive, and they also underestimated how warm their own partners had been.

One study of a hundred-odd couples is one study. It does not prove that a childhood of unattended report cards produces an adult who cannot say congratulations. Nobody has run that experiment, because nobody could. What the work supports is narrower, and it holds up: the capacity to be visibly delighted for someone else tracks with how safe a person feels in close company.

Where envy actually sits in this

Envy gets blamed too readily, partly because the word covers two different animals. Niels van de Ven and colleagues at Tilburg University separated benign from malicious envy across samples in the Netherlands, the United States and Spain. Benign envy produces a moving-up motivation, a scramble to close the gap. Malicious envy pushes the other way, towards seeing the other person knocked off the perch.

Most flat responders are nowhere near the second category. They want the promotion for themselves, and the announcement in the group chat has reminded them that their own equivalent moment went past without a sound. Asking them to perform joy on demand means asking with the wound still open.

Whether any of this is trainable

German has a word for the pleasure of someone else’s misfortune, and psychologists borrowed its inverse. Freudenfreude, joy at another person’s joy, has become a small research programme of its own. Catherine Chambliss, whose work on the subject appears in the World Journal of Psychiatry and Mental Health Research, has reported that mildly depressed undergraduates score lower on freudenfreude and higher on schadenfreude than their peers.

Her team’s training programme leans on two exercises. One is shoy: actively asking someone to say more about their good news, even when the enthusiasm has to be manufactured at first. The other is bragitude: sharing your own achievement in a way that hands credit to whoever helped you get there. In a two-week trial with depressed students, both moods and relationships improved.

Small sample, short window, undergraduate volunteers, so promising rather than settled.

Even so, the mechanism is plausible enough to be worth a try, and it suggests something awkward about the friend who goes quiet. The fix for a person who cannot celebrate you may be someone celebrating them, which is a lot to ask of the person waiting on a reply to their own news. Someone has to go first, and it will not be them.