Watch enough videos about espresso and you may find yourself explaining extraction ratios before you have successfully made a cup you enjoy. Spend a little time with running content and suddenly VO2 max enters your vocabulary. Somewhere along the way, a subject you barely understood becomes a subject you have opinions about, and the transition feels suspiciously effortless.
The internet is exceptionally good at making that transition feel like learning. Sometimes it is learning. Sometimes you have simply become comfortable hearing words you would have needed someone to explain a week ago. A University of Georgia study puts a measurable version of that distinction in front of us, using a subject where misplaced confidence can get expensive.
In research highlighted by UGA on September 28, researchers Xiaoyuan Sun and Swarn Chatterjee examined records from two 2021 national surveys covering more than 2,500 American adults with investments outside their retirement accounts. Participants rated their investment knowledge on a seven-point scale and answered an 11-question test. The questions covered subjects including stocks, bonds, risk, index funds, short selling and options.
More than one-quarter used social media for investment information, and roughly one in five relied on it when choosing investments. Reliance on social media for those choices was associated with higher self-rated knowledge and lower tested knowledge. Traditional media use, by comparison, was associated with higher knowledge by both measures. The confidence people reported and the knowledge they could demonstrate were pointing in different directions.
That is a much more interesting finding than another lecture about people spending too much time on TikTok. It asks what happens when an information source helps you feel capable before you can establish whether you are. The person watching may have learned something useful, but the feeling of competence can extend well beyond the thing they actually learned.
Imagine watching someone explain an index fund clearly. You understand the explanation, recognize the term in the next video and follow a discussion that would have lost you before. That is real progress. The trouble begins when understanding that explanation quietly becomes confidence that you can evaluate an unfamiliar investment, assess its risks or recognize the important detail someone left out.
A good introduction makes a subject approachable. It also leaves things for the next lesson. In a feed, however, the next lesson may be another introduction delivered by another very confident person. You can spend considerable time with a topic while repeatedly encountering the same accessible slice of it. Familiarity accumulates even when the depth of the explanation barely changes.
There is a design problem here. A short video needs to establish its point quickly, hold attention and make sense on a small screen. A clean explanation has an advantage over one that stops to unpack exceptions. A speaker who sounds certain is easier to follow than one who keeps qualifying the circumstances. Useful teaching can happen within those constraints, but the constraints make it easy to lose sight of how much remains unexplained.
Consider the difference between recognizing a mechanic’s description of a transmission problem and diagnosing the problem yourself. The first can help you ask a better question. The second requires knowing which other explanations fit the symptoms and how to tell them apart. A comment section can make those two levels of competence sound remarkably alike, especially when everyone has picked up the same terminology.
The UGA findings also raise a question about what happens after the confidence arrives. Social media use for investment information was associated with more frequent trading. Chatterjee suggested fear of missing out as a possible contributor. An opportunity discussed repeatedly can begin to feel urgent, and urgency leaves less room to work out whether you understand it.
The study, published in the International Journal of Bank Marketing, identifies associations rather than proving that social media caused the knowledge gap or the trading behavior. Its abstract also links traditional media use with higher trading frequency. The finding that matters here is the mismatch between perceived and demonstrated knowledge, not a claim that every active investor has been pushed into trading by a feed.
Beyond investing, the same distinction offers a useful way to examine our own habits. A nutrition video might introduce a question worth asking without giving us the expertise to settle it. A legal clip might explain one principle without preparing us to apply it to a different case. Those are illustrations of the broader problem, rather than additional findings from this investing study. They are also situations in which a little vocabulary can carry a surprisingly large opinion.
There is plenty to value in making difficult subjects accessible. The researchers acknowledge that social media can open investing information to people who previously found it intimidating. Someone who felt excluded from the conversation can finally find a starting point. That matters, particularly when the alternative is never asking the question at all.
The challenge is recognizing the starting point as a starting point. We can understand an explanation without being ready to apply it. We can know what a term means without knowing when it matters. Access to information and understanding information are different achievements, even when both arrive through the same screen.
AI gives this distinction another place to matter. It can produce a readable explanation in seconds, and the ease of reading it can be mistaken for the ease of mastering the subject. Asking follow-up questions can help us learn. Accepting the first fluent answer can leave us with an explanation we are comfortable repeating and very little ability to judge it.
A useful personal test is to step away from the explanation and try to use what you learned. Can you explain why it works in your own words? Can you identify a situation where it would not apply? If the circumstances change, can you still reason through the problem? Those questions reveal more than whether the original video made sense while you were watching it.
The University of Georgia researchers had an advantage over the rest of us: they could put a knowledge test next to a confidence rating. Most feeds never require that comparison. You can keep watching, keep recognizing the language and keep feeling increasingly qualified without encountering anything that asks you to demonstrate the difference.
We should keep learning from whatever opens the door. But before we make the decision, offer the diagnosis or confidently correct a stranger, it is worth asking what we can do with the information once the explanation is gone.
Knowing the vocabulary gets us into the conversation. Knowing the thing is what lets us contribute something worth hearing.
Sources
• University of Georgia research release — September 28, 2026
• Sun and Chatterjee — From media exposure to trading behavior
Study findings attributed to the University of Georgia release and the International Journal of Bank Marketing paper cited in Sources. Cultural framing is RMN's.