A child holding their breath at the sound of a door slamming, observing their parents' faces to guess whether the evening will "go well" or not: this scene speaks to many adults. Growing up in a home marked by disputes, shouts, and mood swings rarely leaves the child indifferent, even when no one is speaking directly to them. Over time, some develop a sort of remarkably precise emotional radar. They seem to "feel" immediately when someone is upset, even before the slightest remark is made. Psychological research shows that this ability does exist, but it is neither a magical "superpower" nor systematic. When the family climate is conflictual and adult moods change abruptly, the child lives in an unstable environment. To try to predict if a scene will explode, they begin to monitor micro-signals: a furrowed brow, a rising tone, a way of placing a glass a bit too forcefully on the table. This constant effort of anticipation is not a conscious choice, but a survival strategy. Over the years, this detection becomes automatic. At adulthood, many report that they "feel" immediately a tension in a room, or that they detect in a second who is in anger. Psychologists speak here of selective attention to danger signals rather than a gift. This vigilance does not focus on all emotions in the same way: it mainly targets what signals a dispute, an humiliation, a punishment. A scientific study published in the journal Child Development followed children exposed to open and hostile parental conflicts. The more exposure to disputes was strong, the more some showed precision in recognizing emotions on faces, especially when expressions were very intense. Researchers observe a link between childhood marked by disputes and better recognition of certain emotional signals, but this link remains limited to very specific situations. Another study, conducted on more than 6,500 children, does not find a simple relationship between early adversities and difficulties in recognizing emotions. Some highly stressed children read faces finely, others not, and many young people who grew up in calmer homes do not stand out particularly. Two children from the same family can follow opposite trajectories: one becomes hyper-focused on anger, the other partially disconnects from what they feel. Experts describe this state of constant alert as emotional hypervigilance. The person immediately notices a change in tone of voice, interprets silence as a possible threat, detects a slight sigh and prepares already for conflict. The child, then the adult, quickly detects certain signals, especially negative ones. This heightened awareness is based on several mechanisms that often combine: selective attention, conditioned learning, and rapid interpretation. In the long term, this hypervigilance can be exhausting. It is not, on its own, a trauma diagnosis, but when it is accompanied by anxieties, sleep disturbances, or relationship difficulties, psychologists recommend talking to a doctor, a child psychiatrist, or a psychologist. Research also reminds us that this ability does not guarantee empathy or well-being. Knowing how to quickly identify someone else's anger does not necessarily mean understanding what they feel deeply or feeling comfortable in relationships. Indeed, a study published in the Journal of Social and Personal Relationships showed that an increased perception of threat in parental conflicts was associated with a less accurate recognition of certain neutral, ambiguous expressions. A better recognition of emotions can coexist with great distrust, or even a tendency to see threats where there are none. Certain factors fortunately mitigate the impact of a conflictual home. The presence of a kind and predictable adult, an attentive teacher, a supportive group of friends, or therapeutic follow-up can help the child realize that not all tensions are dangerous.