The Illusion of Control: How to Trust Yourself With Money — the Smart Way

You're not as in control as you think — and that's actually okay. In this episode of Personal Finance With Molly, we're unpacking two of the most fascinating and financially costly cognitive biases: the Illusion of Control and Overconfidence Bias. From casino chips to stock picks to home renovation budgets, our brains consistently overestimate how much we're steering the ship. But here's the good news: understanding these patterns is genuinely empowering. Tune in to learn why your brain does this (hint: it's trying to help you), how it shows up in your financial life, and six practical tools to make smarter decisions under uncertainty.

What You'll Learn

• What the Illusion of Control is — and the classic Ellen Langer experiments that first revealed it
• Why overconfidence is consistently called the most significant cognitive bias in financial decision-making
• How these biases show up in stock trading, real estate timing, entrepreneurship, debt plans, and DIY investing
• The neuroscience behind why our pattern-seeking brains can lead us astray in complex financial systems
• Six practical tools: pre-mortems, seeking disconfirming evidence, widening planning ranges, diversification as humility, and more
• Why calibrated confidence is more durable — and more powerful — than overconfidence

Key Concepts & Glossary

Illusion of Control The tendency to believe we have influence over outcomes that are actually determined by chance or forces outside our control. First systematically studied by psychologist Ellen Langer (1975).

Overconfidence Bias A well-documented cognitive bias in which people overestimate their own abilities, the accuracy of their knowledge, and the likelihood of positive outcomes. Closely related to the Dunning-Kruger effect.

Planning Fallacy The tendency to underestimate how long tasks will take, how much they will cost, and how many obstacles will arise — while overestimating how smoothly things will go. First identified by Daniel Kahneman and Amos Tversky.

Attribution Error (Self-Serving Bias) The tendency to attribute successes to our own skill or judgment and failures to external factors or bad luck — preventing accurate learning from experience.

Confirmation Bias The tendency to seek out, favor, and remember information that confirms our existing beliefs, while discounting or ignoring contradictory evidence.

Outcome Bias Judging the quality of a decision based on its outcome rather than on the quality of the reasoning at the time the decision was made.

Apophenia The tendency to perceive meaningful patterns, connections, or relationships in random or unrelated information.

Calibrated Confidence A more accurate and durable form of confidence that matches the actual evidence and acknowledges genuine uncertainty — as opposed to overconfidence, which systematically overstates certainty.

Pre-Mortem A decision-making technique in which you imagine, in advance, that a decision has already failed and then reason backward to identify what went wrong — used to surface overlooked risks before committing to a course of action.

Diversification An investment strategy of spreading assets across a variety of investments to reduce exposure to any single risk — an acknowledgment that the future is uncertain and no single prediction is reliable enough to concentrate on.

Research & References

• Langer, E. J. (1975). "The illusion of control." Journal of Personality and Social Psychology, 32(2), 311–328. The foundational paper introducing the concept.
• Kahneman, D. (2011). Thinking, Fast and Slow. Farrar, Straus and Giroux. — Overconfidence as "the most significant of the cognitive biases"; System 1 vs. System 2 thinking.
• Kahneman, D., & Tversky, A. (1979). "Intuitive prediction: Biases and corrective procedures." — Origin of the planning fallacy concept.
• Barber, B. M., & Odean, T. (2000). "Trading is hazardous to your wealth: The common stock investment performance of individual investors." Journal of Finance, 55(2), 773–806. — Landmark study showing overconfident individual investors underperform through excessive trading.
• Moore, D. A., & Healy, P. J. (2008). "The trouble with overconfidence." Psychological Review, 115(2), 502–517. — Comprehensive review of overconfidence research.
• Klein, G. (2007). "Performing a project premortem." Harvard Business Review. — Practical introduction to the pre-mortem technique.
• Duke, A. (2018). Thinking in Bets: Making Smarter Decisions When You Don't Have All the Facts. Portfolio/Penguin. — Excellent accessible treatment of decision-making under uncertainty.

Reflection Prompts

Use these for journaling, conversations with a financial partner or coach, or just quiet thinking:

1. Think of a financial decision that turned out well. How much of that outcome do you attribute to skill? To timing or luck? Is that split honest?
2. Where in your financial life do you feel most confident? Is that confidence grounded in evidence — or in familiarity and pattern-seeking?
3. Have you ever experienced the planning fallacy with a financial goal? What would you tell your past self about building in more buffer?
4. What financial belief do you hold most strongly right now? What's the best argument against it?
5. If a close friend came to you with the same financial plan you're currently considering, what risks would you point out to them?

Transcript

SPEAKER_00 0:05

Hi everyone! Welcome to Personal Finance with Molly, where we talk about all things personal finance. I am your host, Molly Ford Coates. Let's dig in. Hey,

Intro

SPEAKER_00 0:24

hey, hey! Welcome back to Personal Finance with Molly, the show where we take the weird and wonderful and sometimes baffling ways our brain relates to money and then turns them into something actually useful for your life. And I am so glad you're here for today's episode. And I'm gonna start with a story. And I think that we can all relate to this story a little bit in some way or another. So you ever watch people play roulette, for example, at a casino or seen it on TV? And the person playing has this whole system, right? He or she is blowing on the chips before she places them, or she'd been on a winning streak, so she made sure to stand in the exact same spot, or he muttered something about picking numbers that just felt right, right? And he was obviously convinced that he had cracked the code. And he lost, or she lost, obviously. But here's what's fascinating, friends. They didn't feel foolish, they felt like they just needed to refine the system, right? Maybe she blew on the chips wrong, right? Or maybe he broke his lucky stance at the wrong moment. And I say this with so much love because, and this is the whole point of today's episode, is that our brains do this all the time with money. We believe we have more control over financial outcomes than we actually do. And that belief, well, it shapes our decisions in ways that can cost us sometimes a little, but sometimes a lot. So today we are talking about the illusion of control. It is fascinating and it is sneaky and it is a cognitive bias that pops up in behavioral finance. And we're also going to pair it with its close cousin, which is overconfidence bias. Because honestly, they are kind of a package deal. Here's my promise to you: by the end of this episode, you're going to understand why your brain pulls these tricks, how they show up in your financial life, and most importantly, what you can actually do about it. Because awareness isn't just interesting, it is powerful. Let's dig in. So

What IS the Illusion of Control?

SPEAKER_00 3:01

let's start with the basics. The illusion of control was first described by psychologist Ellen Langer back in 1975. And if you haven't heard of her work, she is absolutely worth a deep dive. Her research showed something kind of incredible. People behave as though they can influence outcomes that are entirely determined by chance. She ran a series of studies, some of my favorite in all of psychology, that showed this pattern again and again. In one experiment, she gave people lottery tickets. Some people chose their ticket from a pile, others were simply handed one randomly. Then she asked people how much they'd be willing to sell their ticket for. Well, the people who had chosen their ticket wanted significantly more money to sell it. Even though every ticket had the exact same odds of winning, they had a sense of ownership and control over their quote-unquote choice, even though the choice was meaningless. And in another study, people were more likely to bet higher on a die roll before it happened than after. So once the dice is rolled, you can't control it. Your brain knows that. But before it rolls, your brain goes, well, I could totally influence this. And this is where it gets really interesting for our purposes, because our financial lives are full of moments that feel like skill, but involve enormous amounts of chance, and vice versa. Think about the stock market. Think about the timing of a home purchase. Think about whether your small business takes off. There's real skill involved in all of those things, like good research and sound strategy and careful decisions. They matter, but friends, there's also an enormous amount of randomness. And the illusion of control makes us underestimate the randomness part. Now, here's something I really want you to sit with because it's counterintuitive. This isn't a character flaw, this is your brain trying to help you. Your brain hates randomness. Random equals unpredictable, which equals potentially dangerous. Your nervous system is wired to find patterns, to seek agency, to feel like you have some influence over your environment. And that was really useful when we were, say, figuring out that touching fire equals bad and avoiding fire equals good. The pattern-seeking brain kept us alive. But in complex modern systems like financial markets, that same brain can lead us to see patterns where none exist and to feel like we're steering when we're actually just along for the ride. So we're not broken, we're just human and friends. Understanding that is the first step.

Overconfidence Bias — Your Brain's Most Expensive Habit

SPEAKER_00 6:08

Okay, so now let's talk about overconfidence bias, because this is where the illusion of control gets a financial turbocharger. Overconfidence, well, it is exactly what it sounds like. We systematically overestimate our own abilities, our own knowledge, and the accuracy of our predictions. And when I say systematically, I mean this has been replicated in study after study across cultures, across income levels, across professions. It is one of the most robust findings in all of behavioral economics. Here's a classic one, friends. When people are asked, are you a better than average driver? Somewhere between 65 and 90% of people say yes, depending on the study. Which is, of course, mathematically impossible. Not everyone can be above average, but we all think we are, including me for that matter. The Nobel Prize-winning economist Daniel Kahneman, who you know from thinking fast and slow, and you've heard me talk about him many times, he called overconfidence the most significant of the cognitive biases. And he was specifically thinking about financial decision-making when he said that. Here's why it's so costly in personal finance. First, trading too much. One of the most replicated findings in financial research is that individual investors who trade frequently tend to underperform the market significantly. And they underperform more than investors who trade less. Brad Barber and Terrence Odian, two researchers who have done landmark work in this area, found that the most active traders underperformed by several percentage points annually. Why? Because overconfident investors believe they can time the market, that they have this special insight and that they can see something other people can't. But friends, most of the time they're paying transaction costs and taxes and outsmarting themselves in the process. Second reason, second reason why it's so costly in personal finance, underestimating risk. When we're overconfident, we don't just overestimate our abilities, we also underestimate how much can go wrong. We don't buy enough insurance, we don't have enough in our emergency fund, we take on more debt than is wise because we're certain that our income will just keep going up. And then third, the planning fallacy. This one is huge. The planning fallacy is our tendency to underestimate how long things will take, how much they'll cost, and how many obstacles we'll encounter. And we do this while overestimating just how smoothly everything will go. How many home renovation projects have you heard of that came in on time and on budget? How many business plans? How many, I'll pay this off in six months, credit card balances. The planning fallacy is overconfidence applied to time and money, and it affects almost everyone. And here's the thing that I find both humbling and kind of delightful. Experts are often more overconfident, not less. So knowing a lot about a subject can actually increase the feeling of certainty beyond what the evidence warrants. A little knowledge is a dangerous thing, but a lot of knowledge can sometimes be even more dangerous if it breeds unchecked certainty. So again, not a moral failing, not a sign of arrogance or recklessness, just a deeply human tendency that we can learn to work with.

What This Actually Looks Like in Your Financial Life

SPEAKER_00 10:23

Alright, so let's get really concrete because I don't want this to feel abstract. I want you to hear these examples and go, oh, oh, that's me sometimes. So what does this actually look like in your financial life? So here's one example: stock picking. Let's say you did some research and bought shares in a company. Over the next six months, the stock goes up 30%, right? Amazing. And your brain goes, I knew it, I picked a winner. But here's the question behavioral finance research researchers would ask. Did you pick well or did you get lucky in a rising market? Did your analysis actually predict something, or did the whole sector do well and your stock just came along for the ride? This is the attribution error that overconfidence creates. We attribute wins to our skill and losses to bad luck or some other external factor, which means we never really learn from what's working and what isn't. Here's example two. Real estate timing. Here's a quote. I'm going to wait for the market to dip, then buy. Or here's another quote: now is the perfect time to sell. So, friends, that belief that we can read the real estate market and time it correctly is incredibly common. And the research is pretty clear that most people, including most professionals, cannot reliably do this. The illusion of control makes us feel like we can see the patterns. And overconfidence makes us act on it with conviction. And here's example three: entrepreneurship. Now, friends, this one is nuanced because I actually think a healthy dose of optimism is often necessary to start a business. But research shows that entrepreneurs as a group are significantly overconfident about their odds of success. But studies consistently find that new businesses fail at a much higher rate than entrepreneurs predicted when they started. Now, of course, some of that risk taking is totally worth it, right? Innovation requires people willing to bet on themselves. But the danger is when overconfidence leads to undercapitalization, to not building a financial cushion, to I'll be profitable by month six, definitely. Here's example four. Debt repayment plans. I'll have this paid off in a year. We'll tighten up our budget and knock this out. Right? Have we heard those quotes or maybe even said those quotes before? Planning and intention are wonderful things, but the planning fallacy, which again is overconfidence applied to timelines, means we almost always underestimate how long financial goals will take and overestimate how easy the behavior change will be. And then when we fall short of an unrealistic timeline, we often feel like failures when actually the plan was the problem, not the person. And finally, here's example five: DIY investing without a clear strategy. So there's an interesting phenomenon where people who have just learned a little bit about investing, like just enough to feel confident, they sometimes make bolder moves than even seasoned investors. They've heard enough to feel like they have an edge. And friends, sometimes they do, of course, but sometimes that edge is actually just luck wearing the costume of skill. So do any of those five examples sound familiar? Or maybe even just a little bit familiar? I say, good, that means you're paying

The Interesting Science — Why Our Brains Do This

SPEAKER_00 14:30

attention. Now, I want to take a quick detour into the why, because I think understanding the mechanism actually makes it easier to work with. So here are a few things going on in our brains when the illusion of control and overconfidence kick in. So first, the need for agency. As humans, we are deeply motivated by the feeling of control, right? Psychologists call this the need for personal agency, the belief that our actions matter and that we can influence our outcomes. This isn't just a preference. Research suggests that it's tied to our mental and physical well-being. People who feel a total lack of control often experience helplessness or anxiety or depression. So your brain is actually protecting you when it finds control in random situations. It's trying to preserve your sense of agency because agency feels safe. The problem is that it can go too far. Second, pattern recognition gone wild. Our brains are pattern recognition machines. We are extraordinarily good at finding structure and noise. And in many domains, that's life-saving. But in financial markets, which are genuinely complex and partially random systems, we can see patterns that aren't there. We have the tendency to perceive meaningful connections between unrelated things, right? You've heard of people who swear the Super Bowl predicts the socks, the stock market, or that hemlines correlate with market performance, right? That's actually real historical theory, by the way. These are patterns that feel meaningful, but they aren't. Here's the third confirmation bias. Once we have a belief, like I'm good at picking stocks, or I know when to buy real estate, then we tend to seek out information that confirms it, and then we discount information that doesn't. Confirmation bias and overconfidence feed each other in this loop. We feel confident, we seek confirming evidence, and then we feel more confident. And the fourth one, outcome bias. We judge decisions by their outcomes, not by the quality of the reasoning at the time. If a risky financial decision worked out, like maybe you put a chunk of your savings into a single stock and it doubled, right? We remember that as smart investing. Even if by any objective measure it was a gamble, and that memory reinforces future overconfidence. The good news, once you can name these mechanisms, you start to catch them. They lose a little power. Not all of their power, friends. We're always going to be human, but some of it.

What To Actually Do — Practical Tools

SPEAKER_00 17:33

Alright, so here's where we get to the good stuff. Because you know this show is about more than just understanding our brains. It's about using that understanding to make genuinely better decisions. So let's talk tools. Here's tool one. Separate skill from luck. Actively. Actively separate skill from luck. This is a practice, not just a concept. When a financial decision goes well, ask yourself honestly, what role did skill play here? And what role did luck or circumstance play? You don't have to know the exact percentages or anything. Just the act of asking the question creates a little space between the outcome and your confidence level. And when a decision goes poorly, ask the same question in reverse. Was this a bad decision? Or was it a reasonable decision that just had a bad outcome? Those are different things and they call for different responses. Alright, here's tool two, pre-mortems. This one is a gem from decision researcher Carrie Klein, and Annie Duke writes beautifully about it too, if you want to go deeper. Before you make a significant financial decision, imagine that it's a year from now and the decision did not work out. Now ask, why not? What went wrong? This isn't about being pessimistic. It's about using your brain's problem-solving capacity to identify risks you might be overconfident about. Most of us are much better at generating reasons something could go wrong than when we're imagining it already has. The pre-mortem is a way to access that wisdom before you've committed. Here's tool three. Actively look for the strongest case against your financial conviction. If you're sure now that it is the perfect time to buy a house, what's the best argument that it's not? If you're convinced a certain investment is a sure thing, what would a smart, reasonable skeptic say? You don't have to be convinced by the counter-argument. You just have to take it seriously. It calibrates you. And here's tool number four: widen your planning ranges. Since we know the planning fallacy makes us systematically underestimate costs and timelines, fix that intentionally. Whatever timeline you're planning for for a financial goal, add a meaningful buffer. And no, I don't mean like 10%. Think more like doubling it and see how that feels. If you think you can save for vacation in four months, plan for eight and see if you get there faster. If you think your emergency fund needs to be three months of expenses, some researchers suggest six months might be more realistic for most people. Build in buffer as a feature, not a failure. And tool number five, diversify as an acknowledgement of uncertainty. Diversify as an acknowledgement of uncertainty. This may be the most elegant financial expression of humility that I know. Diversification says, I don't know which of these investments will perform best, so I'm holding all of them. When you concentrate your money in one stock or one sector or one type of asset, you're expressing confidence in your ability to predict the future. And sometimes that pays off. But systematic, evidence-based investing acknowledges that we cannot reliably predict which specific things will win. And so we own a wide, diversified piece of the whole. Now, friends, I know that's not exciting and it doesn't make for the great cocktail party stories, but for most of us, most of the time, it works. And the last one, here's tool number six: create a financial outsider, or in other words, a trusted thinking partner. One of the best things that you can do to counteract overconfidence is involve someone else in significant financial decisions, not necessarily to have the final say, but to provide a perspective that isn't caught up in your emotional investment. So this might be a financial planner or a financially literate friend who will be honest with you, or it could be a partner who asks good questions. The value isn't that they know more than you. It's that they can see things that you can't see precisely because they don't have the same stakes.

Reframe — This Is About Humility, Not Helplessness

SPEAKER_00 22:44

Now, before I wrap up, I want to say something that I think is really important because I don't want you to walk away from this episode feeling like your instincts are broken or that you should just hand all your decisions to someone else. The goal here is not helplessness. The goal here is calibrated confidence, which is actually more empowering than overconfidence because it's based in reality. Overconfidence is a fragile kind of confidence. It's the kind that shatters when something goes wrong and you were sure that it would go right. Calibrated confidence, knowing what you know, knowing what you don't know, and making good decisions under uncertainty, that's durable. That's the calibrated confidence. That's the kind of confidence that serves you over a lifetime. And here's something that I find beautiful about this work. The people who have studied this the longest, like the researchers and the behavioral economists and the financial therapists, they don't stop being overconfident. They just get better at noticing it. They build systems and habits that catch when their brain catch what their brain misses. You don't have to be perfectly rational. You just have to build a life where you're a little better than your most impulsive, unchecked self. And that, friends, is the whole game. You got this, friends. Hey,

Outro

SPEAKER_00 24:19

thanks for listening to another episode of Personal Finance with Molly. If this show resonated with you, please share the episode, follow the show if you are enjoying this podcast all about where your mind, your money, and your behavior intersect. Until next time, take good care, make thoughtful decisions, and remember, the most powerful thing you can do for your financial future is to stay curious about how your mind works!