Why Are Gamblers Superstitious?

Walk through any casino and the rituals are easy to spot: the craps shooter who blows on the dice, the slot player who will only sit at the end machine, the roulette regular who bets the same birthday numbers every visit. None of these change a single outcome. Dice, wheels and slot random number generators have no memory and no way of knowing who is playing. Yet superstition is more common at the gaming table than almost anywhere else. Psychologists have studied why for more than seventy years, and the answer says more about how human brains learn than about gambling itself.

Games built on chance invite a sense of control

In 1975 the Harvard psychologist Ellen Langer published a set of experiments under the title The Illusion of Control. In the best-known one, office workers were sold lottery tickets. Some chose their own ticket; others were simply handed one. Before the draw, each was asked what price they would accept to sell the ticket back. The people who had picked their own asked for several times as much as the people whose tickets had been assigned, even though every ticket had exactly the same chance of winning.

Langer's point was that choice, familiarity, competition and active involvement — features of games of skill — make people feel more in control of a game of pure chance. Casino games are full of these cues. The player picks the numbers, throws the dice, presses the button, decides when to hit. Each act feels like it should matter, so the mind looks for ways to make it matter.

How the craps table shows it

Sociologist James Henslin spent months watching and playing with a group of dice players and described what he saw in a 1967 paper, Craps and Magic. Shooters threw the dice softly when they wanted a low number and hard when they wanted a high one. They snapped their fingers, talked to the dice and asked for silence before an important roll. Players believed that "concentration" and confidence helped, and that a shooter who was not serious would roll badly.

None of these behaviours were taught as rules. They spread because they seemed reasonable inside the logic of the game: the shooter physically controls the throw, so it feels as if the way the throw is made should influence what comes up. The physics of a dice roll bouncing off the back wall of a craps table erases any such influence, but the feeling of control remains.

Pigeons, rewards and accidental rituals

The behaviourist B. F. Skinner gave the classic laboratory version in a 1948 paper, "Superstition" in the Pigeon. Hungry pigeons were fed at fixed intervals no matter what they did. Many developed odd repeated routines — turning in circles, bobbing their heads — apparently because they happened to be doing that movement when food arrived the first time, and kept doing it.

Gambling delivers rewards on an irregular schedule that is ideal for this kind of accidental learning. A player who wore a particular shirt on the night of a big win, or who switched machines just before a jackpot, has a vivid memory linking the action to the reward. Losses that follow the same ritual are quieter and easier to forget. Over time the ritual is strengthened by the occasional win even though the win had nothing to do with it.

The near miss

Slot machines add another ingredient: the near miss, where two jackpot symbols land and the third stops just above or below the payline. Objectively a near miss is just a loss. Psychologically it feels like almost winning.

A study led by Luke Clark at the University of Cambridge, published in the journal Neuron in 2009, scanned the brains of volunteers playing a simple slot-machine task. Near misses activated reward-related areas of the brain that also respond to real wins, and players rated near misses as more pleasant and said they made them want to keep playing — but only on spins where the player had chosen the symbol themselves. When the computer chose, the effect largely disappeared. That links the near miss directly back to Langer's illusion of control: the feeling that "I nearly did it" depends on the sense that the player was doing something.

Superstitions grow easily from that feeling. A player who keeps nearly hitting on a machine may decide it is "due" or "warming up", or that a particular way of pressing the button is getting close.

The gambler's fallacy and the hot hand

Many gambling superstitions are really mistaken beliefs about sequences. The gambler's fallacy is the belief that after a run of one outcome, the opposite outcome becomes more likely — after five reds in a row at roulette, black must be "due". Each spin of a fair wheel is independent, so the chance of black on the next spin is exactly what it was on the first.

The opposite error is believing in streaks: that a shooter is "hot" or a machine is "on a roll" and should be followed. Both errors come from the same place. People expect short sequences of random events to look more balanced and less streaky than they actually do, so real randomness — which is full of clumps and runs — looks like a pattern. A ritual that happened to coincide with the start of a run then seems to have caused it.

Lucky charms and confidence

Some research suggests that lucky charms do something for the person holding them, even if they do nothing to the game. A 2010 study by Lysann Damisch, Barbara Stoberock and Thomas Mussweiler, published in Psychological Science, reported that people told they were using a "lucky" golf ball putted better, apparently because they felt more confident. Later attempts to repeat those experiments, including a 2014 replication by Robert Calin-Jageman and Tracy Caldwell, did not find the same effect, so the finding is now treated with caution.

Even where a charm does raise confidence, confidence can only help in tasks where performance depends on the player. In a game decided entirely by a random number generator or a wheel, there is no performance for it to improve. What a charm can change is how the player feels — calmer, more in control, more willing to keep going — and that last effect is the one to watch.

Why superstition is not harmless at the table

Most rituals cost nothing: blowing on dice does not change the house edge. The risk is in the beliefs underneath them. A player who thinks a machine is "due" may keep feeding it after deciding to stop. A player who believes in a lucky seat may chase losses rather than walk away when the seat is taken. Research on problem gambling has repeatedly found that beliefs about control, luck and predictable sequences are more common and stronger among people who gamble heavily.

The fix is the same arithmetic that the rituals ignore. Every casino game has a fixed house edge set by its rules and pay table. Nothing a player does — no seat, shirt, number or throw — changes it. Knowing that will not make the rituals go away, but it keeps them in their proper place: a bit of theatre around a game whose odds were settled before the player sat down.

Sources

• Langer, E. J. (1975). The illusion of control. Journal of Personality and Social Psychology, 32(2), 311–328.
• Henslin, J. M. (1967). Craps and magic. American Journal of Sociology, 73(3), 316–330.
• Skinner, B. F. (1948). "Superstition" in the pigeon. Journal of Experimental Psychology, 38(2), 168–172.
• Clark, L., Lawrence, A. J., Astley-Jones, F., & Gray, N. (2009). Gambling near-misses enhance motivation to gamble and recruit win-related brain circuitry. Neuron, 61(3), 481–490.
• Damisch, L., Stoberock, B., & Mussweiler, T. (2010). Keep your fingers crossed! How superstition improves performance. Psychological Science, 21(7), 1014–1020.
• Calin-Jageman, R. J., & Caldwell, T. L. (2014). Replication of the superstition and performance study by Damisch, Stoberock, and Mussweiler (2010). Social Psychology, 45(3), 239–245.