Sibling Relationships and Anxiety Symptoms: An Exploration of Heterogenous Subgroups
This study of 516 young adults utilized latent class analysis to identify four distinct sibling relationship profiles, revealing that individuals experiencing high levels of both positive and negative interactions or predominantly negative interactions report significantly higher anxiety symptoms compared to those with very positive or low-intensity satisfied relationships.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Anxiety is a common companion for many young adults, particularly those navigating the transition to college life. While much attention is paid to how parents, friends, or academic pressure affect mental health, the role of siblings often remains in the background. Siblings are the longest-lasting relationships most people will ever have, sharing a history that stretches from childhood through adulthood. Psychologists have long known that the quality of these relationships matters; a supportive brother or sister can be a buffer against stress, while a contentious one can be a source of deep distress. However, human relationships are rarely simple binaries of "good" or "bad." They are complex mixtures of warmth, conflict, support, and friction that happen all at once. Understanding how these different threads weave together to influence a young person's anxiety is the central question this research seeks to answer.
A team of researchers at Illinois State University decided to look at this complexity by studying 516 college students, most of whom were around 19 years old. Instead of asking students to rate their sibling relationships on a single scale, the researchers asked them to describe their experiences across ten different dimensions. These included positive aspects like companionship, emotional support, and sharing secrets, as well as negative aspects like criticism, exclusion, and conflict. By gathering these detailed descriptions, the researchers used a statistical method to group the students into distinct categories based on the unique patterns of their relationships. This approach allowed them to see the "shape" of sibling dynamics rather than just averaging them out.
The analysis revealed that there are four distinct types of sibling relationships among these young adults. The first group, making up about 30 percent of the students, experienced very high levels of positive interaction and very low levels of negativity. The second group, comprising roughly 32 percent, reported high satisfaction with their sibling but had relatively low intensity in both positive and negative interactions; these were relationships that were content but perhaps less emotionally charged. The third group, about 24 percent of the sample, was characterized by a volatile mix of high positive and high negative experiences. These were relationships filled with both intense support and intense conflict. The final group, the smallest at 14 percent, was defined by high levels of negative experiences and low levels of positive ones.
When the researchers compared these groups to see how they differed in terms of anxiety symptoms, a clear pattern emerged. The students in the two groups with the most negative elements—the volatile mix of high highs and low lows, and the group with primarily negative experiences—reported significantly higher levels of anxiety. Interestingly, the two groups with the lowest levels of anxiety were the ones with very positive, low-conflict relationships and the ones with low-intensity, satisfied relationships. This finding suggests that the presence of positive moments does not automatically cancel out the harm caused by frequent conflict or criticism. Even when a sibling relationship is full of love and support, if it is also marked by frequent criticism or exclusion, the young adult is more likely to struggle with anxiety.
The study also uncovered some interesting details about who falls into these different categories. Students in the volatile, high-intensity group were more likely to have an older sibling, which might reflect power dynamics or hierarchical tensions that can fuel both support and conflict. Meanwhile, students in the satisfied but low-intensity group were more likely to have a male sibling. This suggests that the gender of the sibling and the birth order might shape the style of interaction, potentially influencing how those relationships affect mental health.
These results highlight that sibling relationships remain a powerful force in the lives of young adults, even after they leave home. The research suggests that for mental health professionals working with anxious college students, looking at the sibling dynamic could provide valuable clues. It is not enough to simply ask if a student gets along with their brother or sister; understanding the specific texture of that relationship—whether it is a calm, satisfied bond or a turbulent, high-stakes connection—may be essential for finding the right path toward well-being. The study does not prove that siblings cause anxiety, but it strongly indicates that the specific patterns of how siblings interact are deeply linked to how young people feel about themselves and their place in the world.
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