Cognitive Biases in Poker
Cognitive biases are mental patterns that influence decisions in ways players rarely notice in the moment. At the poker table, they show up as overplaying strong hands, chasing losses, misreading opponents, or folding too early out of fear. The eight biases below are among the most common in poker, along with a practical adjustment for each.
Recognizing the Enemy: Confirmation Bias
Confirmation bias is the tendency to favor information that confirms existing beliefs while discounting what contradicts them. At the poker table, it shows up when a player continues to put an opponent on a specific hand despite evidence that the read is wrong.
Combat Strategy: To counteract confirmation bias, actively seek information that challenges your perspective. The corrective is to actively look for what contradicts the initial read. What would need to be true for the read to be wrong?
The Overconfidence Trap
Overconfidence is particularly dangerous in poker. It can lead players to underestimate their opponents or play too loosely, thinking they can outsmart everyone at the table. This bias often kicks in after a big win, where the euphoria of success clouds judgment.
Combat Strategy: Keep a detailed record of your plays and outcomes. Review them regularly to assess whether your wins were due to good decision-making or simply favorable conditions. This reflection helps maintain a realistic assessment of your skills and strategies.
The Anchoring Effect
Anchoring occurs when individuals rely too heavily on the first piece of information they receive. In poker, this might be the initial impression of an opponent’s playing style or the first hand you’re dealt. This bias can skew your strategy and decision-making process throughout a game.
Combat Strategy: Always reevaluate your strategies as new information becomes available. Make it a habit to question initial judgments and adjust your play accordingly to stay flexible and responsive to the dynamics of the game.
Falling for the Gambler’s Fallacy
The gambler’s fallacy is the belief that past events affect future probabilities in independent scenarios. For instance, if a player has lost several hands in a row, they might believe they’re “due” for a win, leading them to bet more aggressively than usual.
Combat Strategy: Remember, each hand in poker is independent of the last. Maintain discipline and stick to your strategic plan, regardless of past outcomes. Base your decisions on logical probabilities, not emotional responses to recent losses or wins.
The Cost of Clinging: Loss Aversion
Loss aversion is a powerful force in poker, where the pain of a loss often feels more significant than the joy of an equivalent gain. This bias can cause players to fold too early or avoid taking calculated risks that are statistically in their favor, just to prevent potential losses.
Combat Strategy: To combat loss aversion, focus on making decisions based on long-term profitability rather than short-term outcomes. Running expected value calculations on reviewed hands will show where fear of loss, not the math, drove the decision.
The Sunk Cost Trap
The sunk cost fallacy leads players to throw good money after bad, continuing to invest in a losing hand because they’ve already committed chips. This can escalate losses rather than cutting them when the odds are unfavorable.
Combat Strategy: Always assess the current situation on its own merits, independent of past investments. A useful check: would this call make sense if the chips already in the pot weren’t a factor? This can help you make more rational decisions based on the present rather than the past.
The Endowment Effect
The endowment effect causes players to overestimate the value of their hand simply because it belongs to them. This can lead to a reluctance to fold or a tendency to engage in confrontations that are not justified by the hand’s actual strength.
Combat Strategy: Regularly practice hand range analysis both during and after sessions to help calibrate your assessment of hand value. Getting second opinions from other skilled players can also help correct any bias in how you value your hands.
The Availability Heuristic in Action
This bias occurs when players judge the frequency and likelihood of events based on how easily examples come to mind, rather than on objective data. In poker, this could manifest as overplaying a hand type that recently won big, ignoring the broader statistical context.
Combat Strategy: Keep detailed records of all your hands and their outcomes to provide a realistic dataset to refer to. Use this data to inform your strategy, rather than relying solely on memorable wins or losses.
Overestimating Influence
The illusion of control can lead players to believe they can influence the cards dealt or other random events, through rituals or false beliefs in their own influence over the game’s outcome.
Combat Strategy: Emphasize the probabilistic nature of poker in your study and practice. Use statistical analysis tools and software to reinforce the randomness of card distributions and outcomes, helping to ground your strategy in reality rather than superstition.
Most of these patterns won’t announce themselves in the moment. They show up in the session review, when the reasoning that seemed obvious three hours ago looks less convincing on paper. Tracking decisions after the fact is where the adjustment actually happens.
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About the Author: Shawn Altbaum has been writing and editing in the online gaming industry since 2007, reporting live from the WSOP Main Event and conducting interviews with professional players. An active poker player, he combines industry expertise with firsthand knowledge of the games he covers. He currently serves as Global Head of Copywriting at NSUS Group, overseeing brand voice and content strategy across GGPoker and GGVegas.
