What is the illusion of control?
The illusion of control is the tendency to believe you influence the outcome of an event that in fact you do not control at all. Ellen J. Langer published "The illusion of control" in the Journal of Personality and Social Psychology in 1975, presenting six experiments showing that people treat chance as if it were skill.
The key point is not that people miscalculate probabilities. The outcome remains random, and the participants know it. What changes is the feeling: when a random situation wears the familiar markers of a skill game, a sense of control appears, and it bends behaviour.
Why does choosing for yourself make a random result seem more trustworthy?
The short answer: being allowed to choose is a marker of skill. In Langer's best-known experiment, participants bought a lottery ticket for one dollar. Half were handed a ticket someone else had chosen, half picked their own number. The experimenter then asked what price they would resell the ticket for. The self-chosen group demanded a noticeably higher price than the assigned group.
No one in either group had different odds of winning. But a self-chosen ticket carries something like effort, like a decision, like a trace of the self. And the brain reads that trace as a signal that the outcome is partly in your hands.
Langer also found other markers that produce the same effect: choosing rather than being assigned, familiarity with the situation beforehand, participation rather than standing outside, and competitive framing. The more markers of skill, the stronger the sense of control.
What exactly does the lottery experiment say?
The scope needs to be stated clearly. Langer's experiment was run in the United States in 1975, on students and research participants of that time. It shows a real effect under those conditions: when allowed to choose, people priced the random ticket higher. It does not show that people believe they can guess the winning number, and it does not show the effect is the same in every culture or every group.
| Study | Year | Data scope | Main result |
|---|---|---|---|
| Langer, "The illusion of control" | 1975 | United States | Six experiments; the self-chosen ticket group demanded a higher resale price than the assigned group |
| Matute et al., "Illusions of causality" | 2015 | Literature review | Illusions of causality form when people believe there is a causal link between two events that are in fact unrelated1 |
| Hamerman and Johar, "Conditioned Superstition" | 2013 | United States | A product that happened to accompany a good outcome is preferred more; tied to the desire for control |
| Darke and Freedman, "The Belief in Good Luck Scale" | 1997 | United States | Belief in good luck is measurable as a stable trait of the self |
How does the illusion of causality work in everyday life?
The illusion of causality appears when people believe two events are causally linked while in fact they are unrelated1. Matute et al. (2015) note that this class of illusion is thought to underlie superstitious and pseudoscientific thinking, and sometimes leads to serious consequences in important areas of life such as health, finance, and welfare1.
The mechanism is not that people cannot reason. It is that they only see part of the data. To know whether something really causes an outcome, you need to compare two situations: when it is present and when it is absent. In everyday life, people rarely have both kinds of observation. When someone does something and a good thing follows, the brain records the pair. When someone does nothing and a good thing still follows, the brain records nothing, because there is nothing memorable.
Matute et al. also point out that the illusion is stronger when people are trying to reach an outcome, and weaker when they are merely observing. An emergency doctor trying to save a patient is more prone to the illusion than a scientist testing the effect of a drug1. This matters for the rest of this article: the very attitude of "I want this to happen" intensifies the effect.
Is there a way to reduce the illusion of causality?
Yes, and the way lies in the method science itself uses. Matute et al. (2015) describe that correct detection of a causal relation is equivalent to using a rigorous experimental approach. It requires awareness that human causal inference is prone to bias, requires testing what happens when the potential cause is absent, requires observing comparable numbers of cases with and without the cause, requires scepticism toward coincidences, and requires seeking full information about all four types of case1.
Matute's 1996 study, cited in the review, shows a notable detail: participants usually fell into the illusion only when their goal was to maximise the outcome, whereas when asked to judge whether they controlled the outcome, and instructed how to judge, they recognised the independence of action and outcome1. In other words, simply changing the question from "how do I win" to "do I actually have any effect" already weakens the effect considerably.
Another way the review suggests: detach yourself from the situation. When a problem directly concerns you, intuition is almost certainly wrong, so someone more objective should judge for you1.
What is conditioned superstition and how does it tie to the need for control?
Conditioned superstition is the phenomenon in which a neutral object becomes "lucky" merely because it happened to appear alongside a good outcome. Hamerman and Johar (2013) published a study of this in the Journal of Consumer Research, titled "Conditioned Superstition: Desire for Control and Consumer Brand Preferences".
The title states the whole mechanism. A product, a brand, an object with nothing special about it suddenly becomes more liked after it accidentally accompanied a favourable outcome. And according to this study, the degree of preference is tied to the consumer's desire for control.
Notably, this effect does not require belief in magic. It operates at a lower level: an association forms, and the association is enough to change buying behaviour. This is the same family of mechanisms as the illusion of causality Matute et al. describe, only measured through consumer choice.
Is belief in luck a stable personality trait?
Darke and Freedman (1997) built the "The Belief in Good Luck Scale" and published it in the Journal of Research in Personality. The scale measures belief in luck as a relatively stable trait of the self, not a passing state.
This study shows it is possible to measure how strongly a person believes they are lucky, and that this level differs from person to person. It does not say that this belief makes people luckier. It says the belief exists as a measurable characteristic, and being a characteristic, it can affect how people choose, remember, and act.
Two different things need to be kept apart here. One is the question "can belief in luck be measured", and the answer is yes. The other is the question "does that belief change outcomes", and the answer is not in this study.
So what about casting hexagrams and drawing fortune sticks?
This is where the limits of the evidence must be stated plainly. No direct study of hexagram casting or fortune-stick drawing among Vietnamese people is used in this article. What can be said rests on effects measured in laboratories elsewhere, and applying them to hexagram ritual is Nhat Nguyet's interpretation, not a measurement on Vietnamese people.
There is one clear overlap. Hexagram casting and fortune-stick drawing meet almost all the markers Langer lists as increasing the sense of control: people do it with their own hands, choose the moment, choose how to phrase the question, and usually follow a fixed sequence of steps. According to Langer, doing it yourself and being allowed to choose are two of the strongest markers of skill.
The second overlap lies in the goal. Matute et al. found the illusion stronger when people are trying to reach an outcome1. People who come to cast a hexagram usually do not come to test whether the hexagram is efficacious. They come because they have a decision to make. That very "needing to" pushes the effect higher.
Kind of knowledge: SchoolSchool's interpretation. How one school or one book reads it; other schools may read it differently. The five labelsIn the understanding of many divination traditions, ritual has its own role: it marks the moment the question is posed, and the questioner's participation is regarded as part of the asking. This article does not discuss whether that tradition is right or wrong. It only notes that do-it-yourself ritual coincides with the conditions that increase the sense of control in psychological experiments.
Kind of knowledge: Folk beliefFolk belief. What people believe, avoid or pass on by word of mouth, recorded as a belief, not as a checked fact. The five labelsIn folk belief, people often say that casting it yourself is more "sacred", that choosing your own number is more "fated". That way of speaking accurately describes the feeling the effect produces, though the feeling itself is not evidence for anything.
Kind of knowledge: UnprovenNot enough evidence. Someone has claimed it, but no source or study is strong enough to confirm it. The five labelsNo study has yet directly measured the illusion of control in the context of hexagram casting, fortune-stick drawing, or ritual offerings to ward off unlucky stars in Vietnam. Survey figures on the practice of star offerings in Ha Noi conducted by the Institute for Religious Studies in 1995 and 2007 show that the share of participants changed over time, but those surveys measured religious behaviour, not the sense of control.
Why does this effect not mean ritual is "right" or "wrong"?
Two questions must be separated. First: why does choosing for yourself make people feel more trusting? The answer is the illusion of control, a real and measured psychological effect. Second: is the hexagram correct? No data in this article answers that, and the illusion of control does not answer it either. A person can fall into the illusion of control while casting a hexagram, and that says nothing about whether the hexagram is right or wrong.
There is another possibility that must be stated at its proper weight. Belief can change behaviour, and behaviour changes outcomes, without any supernatural mechanism at all. A person who believes in the hexagram, changes how they work, persists longer, may get a different outcome. That is a real effect, but it arises from behaviour, not from the system predicting correctly. Phan Ke Binh in "Viet Nam phong tuc" (1915) wrote in this direction when discussing fate, holding that everything is made by human effort, and citing the phrase "huu chi canh thanh" to say that a person with will can overcome circumstance.
What should be kept in mind when reading these studies?
One important point: most of the studies cited here were conducted in the United States, on participant groups of their time. Matute et al.'s review gathers material from many places but is itself a review, not a new experiment1. So one should not infer that the level of illusion of control among Vietnamese people is identical to what those studies measured.
Second: these effects are not signs of ignorance. Matute et al. write that they can happen to anyone under known conditions, like visual illusions1. People who understand probability can still fall in. Statisticians can still fall in. What weakens the effect is not being smarter, but changing how the question is posed and detaching yourself from the situation.
For a closer relative of this phenomenon, the article Illusion of correlation: why two events happening close together make the brain think one causes the other discusses the case of correlation without causation, a different concept from the illusion of control.
