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ONE OF SEVEN WAYS OF SEEING

Cognitive Biases

Recognize the shortcuts that quietly shape your judgment.

963 ideas to exploreArranged from A to Z
Cognitive Biasesintermediate

Selective Criteria Bias in Self-Assessment

Ambiguous traits leave room to choose flattering evidence about yourself. The studies described here examine how that freedom changes when people must use specified criteria, including evidence for negative traits.

statistics · psychology↗
Cognitive Biasesintermediate

Self vs Other Predictions: Overconfidence in Predicting Others' Behavior

In the reported experiment, participants were about equally confident in predictions of themselves and others, but more accurate about themselves. The authors explain this through the distinction between an impression's strength and the amount or reliability of evidence supporting it. They also describe cases where self-predictions are underconfident or overconfident.

decision science · economics↗
Cognitive Biasesintermediate

Self-Anchoring and Adjustment

When making judgments under uncertainty, people often anchor on initial values (even irrelevant ones) and then insufficiently adjust, resulting in biased judgments. This cognitive bias also applies to language use, where interlocutors anchor on their own perspective and inadequately adjust to their partner's viewpoint.

economics · psychology↗
Cognitive Biasesintermediate

Self-Anchoring While Understanding Intention

In the reported experiments, listeners sometimes first considered what they could see or were privately thinking about, then adjusted to what the speaker could know. This egocentric interference occurred even when participants knew that their perspectives differed.

education · psychology↗
Cognitive Biasesintermediate

Self-Deception and Denial

Self-deception and denial are cognitive biases that lead individuals to distort or ignore reality to protect self-interest, maintain comfort, or avoid unpleasant truths, often resulting in wishful thinking and poor decision-making.

business · philosophy↗
Cognitive Biasesintermediate

Self-Dispositional Inference Bias

People often infer their own traits and characteristics from their current moods and behaviors, especially under time pressure or cognitive load, leading to biased self-perceptions that fail to account for situational factors.

psychology · social psychology↗
Cognitive Biasesintermediate

Self-Enhancement Bias and Criteria Specificity

This study varied how many criteria students could use when rating their abilities relative to peers. It examined whether vague traits leave more room for flattering self-assessments than traits evaluated against specified criteria.

education · psychology↗
Cognitive Biasesintermediate

Self-Esteem: Feeling Good About Ourselves

We often use motivated reasoning to protect our ego, constructing flattering narratives for unflattering facts. This can manifest as self-enhancement (boosting ego) or self-protection (avoiding blows to ego), even leading to 'masochistic epistemology' where we assume the worst because it feels safer.

politics · sociology↗
Cognitive Biasesintermediate

Self-Serving Bias

The self-serving bias is the tendency to take credit for positive outcomes (attributing them to skill) and blame negative outcomes on external factors like luck, which impairs learning from experience.

law · business↗
Cognitive Biasesintermediate

Self-Serving Criteria Bias

People may rate their own abilities differently depending on whose criteria they use. In the described experiment, participants given another person’s criteria lowered their self-ratings, while those using their own criteria showed little change. This demonstrates sensitivity to standards, without by itself establishing which ratings were more accurate.

psychology · sociology↗
Cognitive Biasesintermediate

Self-Serving Tendencies and Optimism

We see ourselves as unique and special, with optimistic views of ourselves and our family, overestimating our control over events and underestimating chance. This leads to overconfidence, attribution errors, and a tendency to credit ourselves for success but blame external factors for failure.

medicine · business↗
Cognitive Biasesintermediate

Senescence-Misinfluence Tendency

The passage offers a personal warning about aging, contrasting difficulty with new skills and retention of practiced ones. It recommends continued learning without establishing a uniform pattern of decline.

psychology↗
Cognitive Biasesintermediate

Sensemaking

Sensemaking helps us explain events, but a plausible story can give us more confidence than the evidence warrants. After learning an outcome, we may select details that fit it, overlook chance, and overestimate how predictable it was.

sociology · philosophy↗
Cognitive Biasesintermediate

Serotonin and Randomness

A run of success can increase confidence even when luck contributed heavily to the results. Taleb argues that this can reinforce both the winner’s belief in their ability and other people’s impression of competence. He proposes serotonin as part of the explanation, but the behavioral lesson does not establish a particular biological mechanism.

finance · economics↗
Cognitive Biasesintermediate

Sets and Prototypes

System 1 effortlessly computes averages but cannot easily compute sums, leading to a neglect of quantity in judgments. This is demonstrated by experiments on line lengths and the Exxon Valdez oil spill, where people's willingness to pay was insensitive to the number of birds saved.

statistics · economics↗

Shoehorning

Shoehorning is the cognitive bias of force-fitting current events into one's existing beliefs or agenda, often by misinterpreting prophecies, predictions, or other sources to appear as confirmation.

politics · religion↗
Cognitive Biasesintermediate

Silent Evidence

Silent evidence refers to the invisible successes or survivors that are not accounted for, leading to a biased perception of reality. In medicine, a drug that saves many lives may be avoided because the harms are visible anecdotes while the saved lives remain invisible statistics.

medicine · statistics↗
Cognitive Biasesintermediate

Silent Evidence (Survivorship Bias)

Survivorship bias arises when the cases we observe exclude failures or other missing outcomes. Taleb’s drowned-worshippers story asks what evidence is absent before we credit a practice with success.

history · science↗
Cognitive Biasesintermediate

Silent Evidence (The Health Club for Rats)

Silent evidence is a cognitive bias where we only observe survivors and mistakenly attribute their survival to external factors, ignoring the non-survivors. The rat health club metaphor illustrates how selection bias creates false narratives about causality.

business · philosophy↗
Cognitive Biasesintermediate

Silver Medal Bias (Counterfactual Thinking in Medalists)

The proposed explanation for medalists’ differing satisfaction is counterfactual comparison: silver medalists may focus on missing gold, while bronze medalists may focus on narrowly winning a medal. The supplied discussion asks whether this mechanism accounts for the observed reactions.

sports · psychology↗
Cognitive Biasesintermediate

Silver Medal Bias (Counterfactual Thinking)

The Olympic medal study examined whether silver medalists appeared to focus on nearly winning gold while bronze medalists appeared to focus on nearly missing a medal. The reported ratings support a difference in apparent counterfactual focus, a proposed explanation for differing satisfaction.

psychology↗

Slight Chance Fallacy

An unlikely event occurring does not by itself prove that its earlier probability estimate was too low. Hindsight can make a lucky success seem more predictable than it was.

decision science · psychology↗
Cognitive Biasesintermediate

Social Influence in Sequential Choice

Public, sequential choices can be influenced by earlier choices in the group. Ariely describes diners choosing for uniqueness or conformity and reporting less satisfaction than diners who ordered privately. Choosing independently before sharing a preference may reduce this influence.

business · economics↗
Cognitive Biasesintermediate

Social Proof

Social proof is the psychological phenomenon where people copy the actions of others in an attempt to undertake behavior in a given situation. It can lead to conformity, diffusion of responsibility, and dangerous outcomes when people fail to act independently.

economics · business↗
Cognitive Biasesintermediate

Sociocentrism

Sociocentrism is the unconscious tendency to conform to and validate the beliefs, norms, and taboos of one's social groups, treating them as inherently superior. It is egocentric thinking raised to the group level and can be more destructive due to social sanction.

education · sociology↗
Cognitive Biasesintermediate

Somewhat Happy

Taleb describes Marc, a prosperous lawyer whose long working hours leave him exhausted. The portrait raises a question about whether income and status compensate for their costs in time, health, and relationships.

business · economics↗

Sources of Overconfidence

Overly narrow uncertainty estimates may reflect difficulty imagining why a result could be wrong, unequal scrutiny of confirming and conflicting evidence, or pressure to report precise findings. The source proposes these as possible explanations for patterns in historical measurements of physical constants.

science · statistics↗
Cognitive Biasesintermediate

Spinozan Hypothesis of Belief

The Spinozan hypothesis posits that understanding and believing a proposition are simultaneous mental operations, with rejection being an active process that can be disrupted by cognitive load or interruption, leading to continued belief in false assertions.

philosophy · psychology↗
Cognitive Biasesintermediate

Sponsored Propaganda

State-sponsored content can borrow the credibility of a familiar news outlet when its origin is hard to recognize. Caulfield and Wineburg describe how placement, branding, and inconspicuous disclosures can obscure who produced a story.

media studies · politics↗

Spotlight Effect

The spotlight effect is a cognitive bias where individuals overestimate how much others notice and pay attention to their appearance and actions. This leads to heightened self-consciousness and the belief that one is constantly under scrutiny.

sociology · psychology↗
Cognitive Biasesintermediate

Standing on One Leg

This concept, inspired by Rabbi Hillel's approach to teaching the Torah, advocates compressing complex ideas into a core generating principle (an axiomatic framework) rather than a mere summary. The author's own generator is: we favor the visible, embedded, personal, narrated, and tangible, while scorning the abstract.

science · business↗
Cognitive Biasesintermediate

Statistical Significance Misuse in Applied Analytics

A significance test assesses how compatible data are with a specified null model under stated assumptions. It does not by itself measure practical importance or make a nonrepresentative sample generalizable. Applied analyses need a study design, an effect estimate, and an account of uncertainty as well as any test result.

science · business↗
Cognitive Biasesintermediate

Status Quo Bias

Status quo bias is a preference for the current option beyond what its benefits, risks, and switching costs justify. Uncertainty, loss aversion, and inattention can make defaults unusually sticky. Recognizing the bias means comparing the options, including the costs of staying, rather than assuming that change is always better.

politics · sociology↗

Stealth Advertising (Native Advertising)

Stealth advertising (native advertising) is a highly effective form of marketing that disguises paid promotions as genuine news or editorial content, exploiting readers' trust and leading them to mistake ads for unbiased reporting.

media studies · marketing↗
Cognitive Biasesintermediate

Stereotyping

Stereotyping is the cognitive bias where individuals generalize traits to others based on their group identity, often leading to unfair judgments without individual knowledge.

psychology · sociology↗
Cognitive Biasesintermediate

Stiglitz Syndrome

Taleb uses the label Stiglitz syndrome for experts who select past statements after an event and claim foresight without bearing the consequences of error. His proposed check is to compare their advice with their own exposure to the risk.

philosophy · business↗
Cognitive Biasesintermediate

Stranded at the Summit of Mount Stupid

Grant uses Mount Stupid as a metaphor for confidence that grows faster than competence. A little experience can make people less willing to question their judgments; feedback and awareness of knowledge gaps can help them reassess.

business · education↗
Cognitive Biasesintermediate

Strategic Attitude Shifting

Strategic attitude shifting occurs when decision makers adjust their public attitudes to match the views of a powerful, committed audience to gain approval. This behavior is efficient and expedient when the audience's views are known and the cost of shifting is low, but it can sometimes lead to internalization of the endorsed position.

politics · psychology↗

Strategies for Dealing with Mental Contamination

When direct exposure control is impractical, individuals can detect and mitigate mental contamination in judgments by examining test-retest reliability, assessing covariation with potential contaminants, or considering the opposite. These debiasing strategies each have limitations, particularly when contaminants are consistent or affective reactions are strong.

business · education↗
Cognitive Biasesintermediate

Stress-Influence Tendency

Stress can affect attention, performance, and responsiveness to other people. This account describes Pavlov’s experiments on extreme stress in dogs and the author’s speculative extension to human belief change; the animal findings do not establish a treatment for people.

law · sociology↗
Cognitive Biasesintermediate

Subadditivity

Subadditivity is a cognitive bias where the perceived probability or support for an implicit disjunction (a broad category) is less than the total support for its explicit components, influenced by whether the judgment is made in a singular (individual case) or distributional (frequentistic) mode.

statistics · economics↗
Cognitive Biasesintermediate

Subadditivity Effect

Subadditivity is the cognitive bias where the sum of judged probabilities of mutually exclusive events exceeds 1, often amplified when additional evidence supports multiple hypotheses simultaneously.

statistics · psychology↗
Cognitive Biasesintermediate

Subadditivity in Expert Judgments

People may assign a broad event less probability than the sum they assign to its mutually exclusive subcategories when those are described separately. Studies of experts suggest that professional knowledge does not always prevent this inconsistency.

medicine · finance↗
Cognitive Biasesintermediate

Subadditivity in Frequency Judgment

In this context, subadditivity means that a combined category receives a lower estimate than the sum of separate estimates for its disjoint parts. This excerpt describes a study comparing similar and dissimilar pairs of university majors; it gives the design, not the results.

psychology · mathematics↗
Cognitive Biasesintermediate

Subadditivity in Probability Judgments

Subadditivity occurs when the sum of probabilities assigned to specific, unpacked outcomes exceeds the probability of the more general, packed outcome, violating probability theory. This cognitive bias is demonstrated in experiments where subjects overestimate percentages of specific categories (e.g., number of children) compared to broader groupings.

statistics · psychology↗

Subadditivity of Support

In support theory, a combined hypothesis can receive less judged support than the sum of the supports assigned to its parts. Naming the parts can bring evidence to mind that the combined description leaves out. The effect varies with the descriptions, available evidence, and judgment task.

cognitive science · decision science↗
Cognitive Biasesintermediate

Subadditivity: Causal vs Temporal Unpacking

This study compares two ways of unpacking homicide judgments. Dividing by causal agent produced more implicit subadditivity: naming the alternatives increased their combined support. Dividing by time produced more explicit subadditivity: separately judged components received more support than their stated disjunction.

statistics · economics↗
Cognitive Biasesintermediate

Subjective Validation

Subjective validation is the tendency to evaluate a statement's truth or meaning based on personal reaction rather than objective evidence, leading to errors like the Forer effect where vague descriptions are seen as highly accurate for oneself.

skepticism · psychology↗
Cognitive Biasesintermediate

Substitution Heuristic

When a question is difficult, we may answer an easier one without noticing: how much a person resembles a stereotype instead of how likely an outcome is, or how easily an event comes to mind instead of how often it happens. This substitution can produce systematic errors and, when people use different cues, inconsistent judgments.

politics · education↗

Sunk Cost Fallacy

The tendency to continue investing in a failing endeavor because of the resources already committed, rather than cutting losses and reallocating resources to better alternatives.

education · sociology↗
Cognitive Biasesintermediate

Superstition

Superstitions arise from the memorability of psychologically painful sequences, such as when good data turn bad, leading to erroneous beliefs. The concept also involves anticipatory regret, as seen in behaviors like blackjack players standing at 16 due to fear of a bad outcome.

gambling · statistics↗
Cognitive Biasesintermediate

Superstitious Beliefs and Counterfactual Thought

Counterfactual thoughts ('if only' thoughts) can encourage superstitious beliefs through two mechanisms: memory distortion (making mutable events more available and subjectively probable) and anticipated regret (avoiding actions that could lead to more painful regret).

psychology↗