A new psychology study suggests that early social rejection in the teen years may shape personality in an unexpected way. Researchers followed high school students over time and found that rejection did not predict “dark” traits directly. Instead, it seemed to work through loneliness, which later lined up with higher Dark Triad traits like Machiavellianism, psychopathy and narcissism.
For parents, teachers and teens themselves, the takeaway is not that rejection “creates” a certain kind of person. It is that social pain can echo. When feeling shut out becomes a pattern, it may nudge some teens toward tougher, more self-protective social styles.
What the Researchers Wanted to Know
Most people can remember a time they were ignored, excluded, or pushed out of a friend group. For teenagers, those moments can feel huge. Their social world is still forming and peer status can look like everything.
In this study, researchers Junwei Pu and Xiong Gan asked a focused question: can social ostracism during adolescence help explain later changes in the Dark Triad? And if it can, what psychological process connects the dots?
Rather than treating dark traits as fixed, the team treated adolescence as a window where traits can still shift. They were especially interested in whether loneliness might act like a “bridge” between being rejected and later developing more manipulative or self-centered tendencies.
How They Tracked Social Rejection, Loneliness and Personality Over Time
To test their ideas, the researchers used a longitudinal study, which means they followed the same teens across multiple time points. They recruited 294 adolescents, ages 15 to 18, from public schools in Jingzhou City, China.
Across the study period, students filled out self-report surveys three times: October 2022, April 2023 and December 2023. The surveys asked about experiences of being excluded or ignored, feelings of loneliness and tendencies linked to Machiavellianism, psychopathy and narcissism.
By the final wave, 230 teens were still participating. Some dropped out due to relocation or choosing to stop. That kind of attrition is common in multi-wave research, especially with busy school schedules and changing life circumstances.
The paper was published in the Journal of Personality and you can find the paper online. The researchers used statistical models to see whether early rejection predicted later loneliness and whether that loneliness predicted later Dark Triad scores.
Loneliness Explained the Link Between Rejection and Dark Traits
The main pattern was clear. Teens who reported more rejection early on tended to report more loneliness later. Then, those who felt lonelier at the next time point tended to show higher Dark Triad traits at the final time point.
Importantly, the researchers did not find strong evidence for a direct path from social rejection straight to dark traits. The stronger story was indirect. Rejection seemed to matter because it was tied to loneliness and loneliness was tied to later personality shifts.
One way to picture this is to think about social learning. If a teen repeatedly gets the message that they do not belong, they might start expecting rejection. Over time, that expectation can change how they act with others, especially if loneliness starts to feel like the default.
Note: This kind of model can show a pattern that fits the data over time. It still does not prove that rejection “caused” the personality changes on its own. Other influences could also be involved, including family stress, other peer problems, or earlier personality differences.
Machiavellianism, Psychopathy and Narcissism Did Not Shift in the Same Way
The Dark Triad is often talked about as a group, but each trait has its own flavor. Machiavellianism is more about strategy and manipulation. Psychopathy often includes impulsivity and low empathy. Narcissism tends to involve grandiosity and wanting admiration.
In the study’s deeper look, the traits did not move in perfectly matched ways. Machiavellianism was linked to early rejection, but its connection to loneliness looked weaker than the other traits. That suggests some teens might respond to rejection by becoming more calculating, even without feeling deeply lonely.
Psychopathy, on the other hand, appeared more strongly connected with loneliness in this dataset. That fits a possible real-world pathway where long-term isolation lines up with more disconnected, risk-taking, or callous behaviors.
Narcissism showed a more mixed pattern. The researchers found that it linked to earlier loneliness, but the relationship was less consistent across time. In everyday terms, some lonely teens might “over-correct” by building a bigger self-image, but that pattern may not be stable for everyone.
Why Feeling Shut Out Can Shape How Teens Protect Themselves
Loneliness is not just being alone. It is feeling cut off, unseen, or unsupported. For a teen, that can be emotionally intense, especially when social life is tied to school, sports and online spaces.
So why might loneliness connect to dark traits? A practical explanation is that loneliness can push people toward self-protection. If belonging feels unreliable, a teen may start focusing on control, status, or emotional distance as a safer path.
From that angle, some “dark” behaviors can look less like pure cruelty and more like a defensive style. Being charming but calculating can reduce the risk of getting hurt. Acting tough or uncaring can hide vulnerability. Acting superior can cover shame.
Callout: None of this means that a rejected teen is destined to become manipulative or unkind. It does suggest that repeated exclusion can shape what feels “smart” socially, especially when loneliness sticks around for months.
What This Could Mean for Friend Groups, Classrooms and Social Media
For everyday life, the study points to a simple message: peer exclusion is not a small thing. It can alter how teens see themselves and how they expect other people to treat them.
In schools, that matters because social rejection is not always obvious. It is not only bullying or direct insults. It can be quiet. It can look like not getting invited, being left on read, or getting ignored when trying to join a group.
If you are a parent, teacher, coach, or mentor, the study supports watching for patterns that signal social isolation. Here are a few practical, non-clinical signs that can be easy to miss:
- They stop trying to join group activities, even ones they used to like.
- They talk about people as “users” or “fake” all the time.
- They become unusually focused on status, control, or getting even.
Online spaces can amplify this too. Social media can turn exclusion into a visible scoreboard, like party photos or group chats a teen can see but cannot enter. That visibility may increase loneliness, even when a teen is surrounded by people at school.
Key Limits to Keep in Mind
Like any study, this one has boundaries. The sample came from a specific place and cultural setting, public schools in Jingzhou City, China. Teens in other regions may experience rejection differently, or respond to it in different ways.
The measures were also self-reported. That means the results depend on how teens remembered and interpreted their experiences. Two students can live through the same social event and report it in different ways.
Another key point is causality. Even with multiple waves, the design cannot fully rule out other explanations. Pre-existing personality tendencies could shape both later loneliness and later peer rejection. Life events between waves could matter too.
What Researchers Want to Test Next
Future research could look at protective factors that soften the loneliness pathway. Supportive friendships, strong family ties and a sense of belonging at school might reduce the risk that rejection turns into long-lasting loneliness.
It would also help to test whether targeted social inclusion efforts change the trajectory. For example, researchers could examine whether group-based classroom practices, peer mentoring, or structured activities that build connection reduce later increases in dark traits.