Every day, millions of Americans tap a tiny yellow face into a work Slack, a Teams message, or a quick email reply and hit send without a second thought.
It feels harmless. It might even feel friendly. But something is happening inside that message that the sender almost never sees.
The small habit that now defines the American workday
When people interact in person, subtle signals like facial expressions, body language, and tone of voice play a crucial role in communicating intent and meaning.
Written communications lack these nonverbal cues and can lead to misinterpretation.
The advent of emojis became a popular tool to provide context to written messages, and they work in many settings. But the assumption that they always help, especially at work, turns out to be far too simple.
Americans are now sending billions of messages a day through workplace platforms. As messaging overtook phone calls as the default daily communication channel, the emoji slipped quietly into the professional inbox alongside it.
How researchers built a controlled window into the office inbox
A study examined how using positive and negative emojis in simulated workplace instant messages influenced perceptions of the sender’s competence and communication appropriateness.
It tested 243 participants, 134 men and 109 women, who read messages varying in sentence valence, emoji valence, and sender gender.
The messages varied on three dimensions: the emotional tone (positive, negative, or neutral), the emoji attached (a grinning face, an angry face, or none) and whether the sender was described as a woman or a man.
The design was deliberate. The team selected only three unambiguous options, a positive “grinning face” emoji, a negative “angry face” emoji, or no emoji at all, to minimize interpretive variability and focus on clear positive and negative emotional valences.
Each message was pre-tested to confirm its emotional tone, whether it read as genuinely positive, negative, or neutral, before any participant ever read it.
What the ratings revealed that surprised even the researchers
Messages with no emojis were clearly the winner, making the sender appear more competent and professional.
That was expected. What was not expected was the precision of the damage a single mismatched symbol could do.
Negative emojis were consistently considered inappropriate for workplace communication as they made senders seem less competent, especially when the message itself was already positive or neutral.
And the instinct many people have, adding a cheerful emoji to soften bad news, backfired badly. Positive emojis do not soften bad news or critical feedback; instead, they may create a sense of dishonesty and insincerity when used in a negative message.
The reader, in other words, detects the mismatch and penalizes the sender for it, even if they can’t explain why.
The matching rule: the hidden system inside every chat window
Both sentence and emoji valence significantly influenced perceptions of sender competence and appropriateness in professional communications. Positive emojis enhanced competence perceptions when paired with positive or neutral sentences, but had no effect with negative sentences.
In fact, when positive emojis were paired with negative sentences, they actually decreased perceived competence relative to both negative emojis and no emojis, confirming that the effect is contingent on the overall tone of the message.
That is the mechanism. The emoji does not carry meaning on its own. It is evaluated against the emotional register of the words beside it, and any gap between the two signals triggers a trust penalty.
“Emojis are not simply neutral add-ons to text messages; they can influence how others perceive us, particularly in terms of competence and appropriateness,” wrote lead author Erin L. Courtice from the School of Psychology at the University of Ottawa. The study was published in Collabra: Psychology in January 2026.
The study was led by Erin L. Courtice of the School of Psychology at the University of Ottawa, working with Megan Lawrence, Charles A. Collin of SUNY Brockport, and Isabelle Boutet.
The finding connects to a broader pattern researchers have been tracking in digital communication. The use of emojis in text messaging improves perceived responsiveness and thereby enhances closeness and relationship satisfaction, according to a study published in the open-access journal PLOS One by Eun Huh from the University of Texas at Austin.
Surprisingly, there were no significant differences between face and non-face emojis, suggesting that it may be the presence of emojis, rather than their specific type, that drives perceptions of greater partner responsiveness.
In personal messaging, the bar is low: almost any emoji reads as warmth. In a professional setting, the bar shifts, and the matching rule takes over.
What this means the next time you reach for the grinning face
The practical guidance that falls out of the research is straightforward, even if the mechanism behind it is not.
For anyone sending workplace messages, the lesson is not that emojis are forbidden, it is that they are risky in ways people may underestimate. If your message is already clear and professional, leaving the emoji out may protect your credibility. Positive emojis may work in neutral or upbeat exchanges, but they do not automatically make you seem more appropriate. Negative emojis appear to carry the biggest downside and are generally best avoided. They are not the problem. The mismatch is the problem.
A lighthearted “thanks, great work! 😀” is fine. A “we need to talk about this report 😀” is not. The emoji did not change the words. It just made the reader trust the sender less.
This also intersects with the growing gap between how younger and older adults read social signals, because the emoji-native generation that grew up texting may apply the personal-messaging rule everywhere, including at work, without realizing the context has shifted.
The effect of positive emojis on perceived competence depended on the valence of the text message: when paired with positive or neutral sentences, positive emojis enhanced perceptions of competence relative to negative emojis, but not relative to no emojis at all. When the positive emoji reinforces the positive tone of a message, it can maintain positive perceptions of the sender’s competence, but when incongruently paired with a negative message, it may create a sense of dissonance or insincerity, leading to negative evaluations of the sender.
The emoji is not going away. But understanding the matching rule, keep the symbol’s emotional charge aligned with the message’s emotional charge, turns out to be the single most useful thing a worker can know about digital communication that no onboarding deck ever taught them.
