A runner finishes a local 10K in a time she is pleased with. Then she checks the results and sees the person in her age group who finished eight minutes ahead. The same run now feels like a different run. Nothing about her legs or her lungs has changed; only the comparison has.
People have always measured themselves against other people. The question researchers ask is when that habit helps, when it hurts, and how much of the modern worry about it, especially about social media, is actually supported.
Festinger’s starting idea
In 1954 the social psychologist Leon Festinger published a theory of social comparison. His central point was practical. We often want to know how good we are at something, or whether our opinions are reasonable, but many abilities have no objective scoreboard. In that situation, people tend to look at others. Festinger also proposed that we get the most useful information from people who are reasonably similar to us, because comparing a beginner with a champion tells us little.
Later researchers added a useful distinction. Upward comparison means looking at someone who seems to be doing better. Downward comparison means looking at someone who seems to be doing worse. Each can serve different goals, such as honest self-assessment, improvement, or feeling better after a setback.
Upward comparison
Can show what is possible and offer a model to learn from. It can also make our own position feel smaller, particularly when the other person seems far ahead.
Downward comparison
Can offer reassurance after a failure or setback. It can also feel uncomfortable when it turns into looking down on others, or when it is a warning about a future we fear.
What does the broader research say?
A 2018 meta-analysis in Psychological Bulletin by Gerber, Wheeler, and Suls pulled together decades of experiments. Two findings stand out. First, when people are free to choose whom to compare with and no one is under threat, they strongly prefer upward targets. Second, the dominant reaction was contrast: self-evaluations moved away from the comparison target. A strong other made people rate themselves lower, and a weaker other made them rate themselves higher. Contrast was clearest for ability judgments. The authors found less support for the idea that people mostly compare downward to protect themselves.
Notice what that does not say. It does not claim that comparing is harmful by default. Comparison is a normal way to calibrate. The trouble starts when the comparison group is unrealistic, the dimension does not matter to us, or the habit becomes automatic.
The social media question
Social platforms put an enormous number of people into view, often at their most polished. It is natural to suspect that this fuels harmful comparison, and some research supports the suspicion. A 2020 systematic review by Verduyn and colleagues concluded that passive browsing is associated with more comparison, that people usually feel worse after comparing with others who seem better off, and that comparison may be one pathway linking social network use to lower well-being. They also reported that people who habitually compare are more vulnerable.
A 2022 review by Meier and Johnson, though, argued the picture is less settled than public worry suggests. They noted that newer studies from 2019 to 2021 increasingly contradict the earlier conclusion, with positive links to well-being, effects that differ between people or situations, or effects that run in both directions.
Why the mirror is so slippery
Several things make comparison hard to use well.
- We see highlights. Public posts and public résumés show outcomes, not the doubt and the unglamorous work behind them. That gap is an inference from how people tend to present themselves, not a measured number.
- The reference group moves. A comparison with a small circle of friends is different from one with thousands of strangers, and the second set has no natural limit.
- Dimensions get blurry. Festinger’s account fits best where there is a clear standard. Comparing on appearance, success, or happiness is harder, because there is no agreed scoreboard.
Using the instinct instead of obeying it
Because the habit is built in, the practical question is not how to stop comparing but how to direct it. Related ideas appear in the article on why we overthink, where replaying a moment can turn one number into a verdict on the whole self. They also connect to the need to belong, since a lot of comparison is really a check on where we stand with others.
If comparison is leaving you persistently anxious, ashamed of your body, or preoccupied with food or weight, talk to a doctor or a mental health professional. This article is educational and not medical advice.
