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Scientific taxonomy

Cognitive

Cognitive Biases

Mental shortcuts and thinking patterns that can lead to errors in judgment

Loaded Language

Loaded language (also known as loaded terms or emotive language) is rhetoric used to influence an audience by using words and phrases with strong connotations.

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Euphemism

A euphemism is a mild or indirect word or expression substituted for one considered to be too harsh or blunt when referring to something unpleasant or embarrassing.

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10 min read

Paradox of Choice

The paradox of choice is the idea that having too many options can make decisions harder, reduce satisfaction, and even lead to decision paralysis.

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10 min read

Choice Overload Effect

The choice overload effect occurs when having too many options makes it harder to decide, reduces satisfaction, or leads people to avoid choosing at all.

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2 min read

Procrastination

Procrastination is the action of unnecessarily and voluntarily delaying or postponing something despite knowing that there will be negative consequences for doing so.

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2 min read

Time-Saving Bias

The time-saving bias describes the tendency of people to misestimate the time that could be saved (or lost) when increasing (or decreasing) speed.

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2 min read

Temporal Discounting

Temporal discounting (or hyperbolic discounting) is the tendency for people to have a stronger preference for more immediate payoffs relative to later payoffs.

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2 min read

Ambiguity Effect

The ambiguity effect is a cognitive bias where decision makers avoid options that are considered to be ambiguous or to have missing information.

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9 min read

Recency Illusion

The recency illusion is the tendency to believe that something we have just noticed is new, when in fact it has existed for a long time.

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10 min read

Salience Bias

Salience bias is the tendency to focus on the most noticeable or emotionally striking information, while ignoring less vivid but often more important data.

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9 min read

Negativity Bias

Negativity bias is the tendency to give more weight to negative experiences or information than to positive ones of equal intensity.

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10 min read

Nocebo Effect

The nocebo effect occurs when negative expectations or beliefs about a treatment or situation produce harmful or unpleasant outcomes.

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10 min read

Placebo Effect

The placebo effect is the phenomenon where a person's symptoms improve after receiving an inert treatment, driven by expectations, meaning, and context rather than active ingredients.

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9 min read

Mere Exposure Effect

The mere exposure effect is the tendency to develop a preference for things simply because we are familiar with them.

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8 min read

Frequency Illusion

The frequency illusion is the tendency to notice something more often after we first become aware of it, making it seem like it suddenly occurs more frequently.

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9 min read

Fear of Missing Out (FOMO)

Fear of Missing Out (FOMO) is the anxious feeling that others are having rewarding experiences without you, driving constant checking and overcommitment.

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10 min read

Automation Bias

Automation bias is the tendency to over-trust computer systems and automated recommendations, discounting or overlooking contradictory human judgment or real‑world evidence.

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2 min read

Affect Heuristic

The affect heuristic is a mental shortcut where people make decisions and solve problems by relying heavily on their current emotional state.

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10 min read

Representativeness Heuristic

The representativeness heuristic is the tendency to judge the probability of an event by how much it resembles a typical case, often ignoring base rates and statistical logic.

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9 min read

Einstellung Effect

The Einstellung effect is the tendency to stick with familiar solutions and strategies even when better or simpler options are available.

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9 min read

Law of the Instrument

The law of the instrument is the tendency to overuse familiar tools or approaches, seeing problems mainly in terms of the solutions we already have.

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9 min read

Functional Fixedness

Functional fixedness is the tendency to see objects and resources only in terms of their usual functions, making it harder to spot creative uses.

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10 min read

Congruence Bias

Congruence bias is the tendency to test only one favored hypothesis and to ignore or underexplore alternative explanations.

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10 min read

Ostrich Effect

The ostrich effect is the tendency to avoid or ignore negative information, especially about risks or losses, in order to reduce anxiety.

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10 min read

Information Bias

Information bias is the tendency to seek or value information that does not meaningfully improve decisions, simply because more information feels better.

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10 min read

Ambiguity Aversion

Ambiguity aversion is the tendency to prefer known risks over unknown or poorly defined risks, even when the expected outcomes are similar.

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10 min read

Commitment Bias

Commitment bias is the tendency to stick with past decisions or stated positions, even when they are no longer optimal, in order to appear consistent.

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10 min read

Irrational Escalation

Irrational escalation is the tendency to continue investing in a failing course of action because of past investments, even when changing direction would yield better outcomes.

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10 min read

Mental Accounting

Mental accounting is the tendency to treat money differently depending on where it came from or how we label it, rather than viewing all funds as interchangeable.

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8 min read

Denomination Effect

The denomination effect is the tendency to spend money more easily when it is in smaller units (like coins or small bills) than when it is in larger units.

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9 min read

Unit Bias

Unit bias is the tendency to view a single unit of something—such as a portion, package, or task—as the appropriate or complete amount, regardless of its actual size.

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10 min read

Money Illusion

Money illusion is the tendency to think in terms of nominal currency values rather than real purchasing power adjusted for inflation.

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9 min read

Distinction Bias

Distinction bias is the tendency to overemphasize small differences between options when comparing them side by side, even though those differences matter little in isolation.

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10 min read

Contrast Effect

The contrast effect is the tendency to judge something as better or worse depending on what it is compared to, rather than on its absolute qualities.

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2 min read

Forer Effect

The Forer effect (also known as the Barnum effect) is the tendency for individuals to give high accuracy ratings to descriptions of their personality that supposedly are tailored specifically for them, but are in fact vague and general enough to apply to a wide range of people.

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2 min read

Rhyme-as-Reason Effect

The rhyme-as-reason effect (or Eaton-Rosen phenomenon) is a cognitive bias where a saying or aphorism is judged as more accurate or truthful when it is rewritten to rhyme.

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2 min read

Fluency Heuristic

The fluency heuristic is a mental shortcut where the ease of processing information (fluency) is used as a proxy for its truth, value, or likelihood.

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2 min read

Illusion of Explanatory Depth

The illusion of explanatory depth is the tendency for people to believe they understand how something works much better than they actually do.

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2 min read

Declinism

Declinism is the belief that a society or institution is tending towards decline. Particularly, it is the predisposition to view the past more favorably and the future more negatively.

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11 min read

Motivated Reasoning

Motivated reasoning is the tendency to process information in a way that suits our desired conclusions, rather than seeking objective truth.

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9 min read

Post-Purchase Rationalization

Post-purchase rationalization is the tendency to justify a purchase after the fact by focusing on its positives and downplaying its drawbacks.

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11 min read

Cognitive Dissonance

Cognitive dissonance is the psychological discomfort we feel when our beliefs, attitudes, or behaviors conflict, often leading us to change one of them to restore harmony.

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10 min read

Belief Perseverance

Belief perseverance is the tendency to cling to initial beliefs even after the evidence used to form them has been discredited or overturned.

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12 min read

Zero-Risk Bias

Zero-risk bias is the tendency to prefer options that completely eliminate a small risk over options that achieve larger overall risk reductions but leave some risk remaining.

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10 min read

Endowment Effect

The endowment effect is our tendency to value things we own more highly than identical things we do not own, simply because they are ours.

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5 min read

IKEA Effect

Overvaluing things we partially created.

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5 min read

Focusing Effect

Overemphasizing one aspect while ignoring others.

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5 min read

Impact Bias

Overestimating emotional impact of future events.

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5 min read

Restraint Bias

Overestimating our self-control.

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5 min read

Projection Bias

Assuming our future preferences will match our current ones.

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5 min read

Present Bias

Overvaluing immediate rewards.

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6 min read

Hyperbolic Discounting

Preferring smaller, sooner rewards over larger, later ones.

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5 min read

Normalcy Bias

Underestimating the likelihood of disaster.

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5 min read

Outcome Bias

Judging decisions by results, not quality.

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5 min read

Illusion of Control

Overestimating our influence over outcomes.

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5 min read

Planning Fallacy

The planning fallacy is a phenomenon in which predictions about how much time will be needed to complete a future task display an optimism bias and underestimate the time needed.

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5 min read

Overconfidence Bias

Overestimating our knowledge and abilities.

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11 min read

Conjunction Fallacy

The conjunction fallacy is the tendency to judge a specific, detailed scenario as more likely than a more general one that contains it, violating basic probability rules.

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12 min read

Base Rate Fallacy

The base rate fallacy is the tendency to ignore or underweight general statistical information (base rates) in favor of vivid or specific case details when judging probability.

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12 min read

Regression to the Mean

Regression to the mean is the statistical tendency for extreme performances or measurements to be followed by more average ones, often misinterpreted as real change or the effect of interventions.

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11 min read

Hot-Hand Fallacy

The hot-hand fallacy is the belief that a person who has experienced a streak of success is more likely to continue succeeding, even when outcomes are independent and random.

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11 min read

Gambler’s Fallacy

The gambler’s fallacy is the mistaken belief that past random events make future independent events more likely to be the opposite, such as expecting a tail after many consecutive heads.

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10 min read

Pessimism Bias

Pessimism bias is the tendency to overestimate the likelihood of negative outcomes and underestimate the likelihood of positive ones, especially for oneself.

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11 min read

Optimism Bias

Optimism bias is the tendency to underestimate the likelihood of negative events and overestimate the likelihood of positive ones, especially for ourselves.

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12 min read

Sunk Cost Fallacy

The sunk cost fallacy is the tendency to continue a course of action because of past investments of time, money, or effort, even when changing course would lead to a better outcome.

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12 min read

Status Quo Bias

Status quo bias is the tendency to prefer the current state of affairs and avoid change, even when alternatives are objectively better.

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3 min read

Framing Effect

The framing effect is a cognitive bias where people decide on options based on whether the options are presented with positive or negative connotations; e.g. as a loss or as a gain.

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15 min read

Dunning-Kruger Effect

The Dunning-Kruger effect is a cognitive bias where people with low ability at a task overestimate their ability.

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12 min read

Availability Heuristic

The tendency to overestimate the likelihood of events with greater 'availability' in memory, which can be influenced by how recent, unusual, or emotionally charged the memories are.

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10 min read

Anchoring Bias

The tendency to rely too heavily on the first piece of information encountered (the 'anchor') when making decisions, even when that information is irrelevant or arbitrary.

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8 min read

Confirmation Bias

The tendency to search for, interpret, favor, and recall information that confirms pre-existing beliefs while giving disproportionately less consideration to alternative possibilities.

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