Cognitive Biases

CogBias

A practical cognitive-bias site with clear definitions, learning paths, assessments, self-audits, and debiasing tools.

Category

Opinion Reporting

Biases here distort what people say they believe, prefer, remember preferring, or think they observed.

25 biases

Biases in this category

Use these side by side before deciding which label best fits the judgment failure you are seeing.

Anthropocentric thinking

The tendency to use human analogies as a basis for reasoning about other, less familiar, biological phenomena

Opinion ReportingSelf-Perspective

Anthropomorphism

Characterization of animals, objects, and abstract concepts as possessing human traits, emotions, or intentions. The opposite bias, of not attributing feelings or thoughts to another person, is dehumanised perception, a type of objectification

Opinion ReportingSelf-Perspective

Backfire effect

A tendency to react to disconfirming evidence by strengthening one's previous beliefs

Opinion ReportingInertia

Bandwagon effect

The tendency to do (or believe) things because many other people do (or believe) the same. Related to groupthink and herd behavior

Opinion ReportingOutcome

Ben Franklin effect

Where a person who has performed a favor for someone is more likely to do another favor for that person than they would be if they had received a favor from that person

Opinion ReportingSelf-Perspective

Bias blind spot

The tendency to see oneself as less biased than other people, or to be able to identify more cognitive biases in others than in oneself

Opinion ReportingSelf-Perspective

Courtesy bias

The tendency to give an opinion that is more socially correct than one's true opinion, so as to avoid offending anyone

Opinion ReportingOutcome

End-of-history illusion

The age-independent belief that one will change less in the future than one has in the past

Opinion ReportingInertia

Halo effect

The tendency for one salient positive or negative impression to spill over into unrelated judgments about a person, product, or institution.

Opinion ReportingAssociationTeams & managementPersonal decisions

Illusion of asymmetric insight

Where people perceive their knowledge of their peers to surpass their peers' knowledge of them

Opinion ReportingSelf-Perspective

Illusion of learning

A false belief that if you understand something you learned and acquired a knowledge about it

Opinion ReportingOutcome

Illusory superiority

The tendency to overestimate one's desirable qualities, and underestimate undesirable qualities, relative to other people. (Also known as "Lake Wobegon effect", "better-than-average effect", or "superiority bias".)

Opinion ReportingSelf-Perspective

Impostor Syndrome

A psychological occurrence in which an individual doubts their skills, talents, or accomplishments and has a persistent internalized fear of being exposed as a fraud. Also known as impostor phenomenon

Opinion ReportingSelf-Perspective

Moral credential

Effect: Occurs when someone who does something good gives themselves permission to be less good in the future

Opinion ReportingAssociation

Moral luck

The tendency for people to ascribe greater or lesser moral standing based on the outcome of an event

Opinion ReportingOutcome

Naïve realism

The tendency to experience one's own perception of reality as the obvious, objective view and to treat disagreement as evidence that others are uninformed, irrational, or biased.

Opinion ReportingSelf-PerspectiveMedia & politicsConflict & dialogue

Negativity bias

The tendency to give bad news, threats, criticism, and losses more psychological weight than equally sized positives.

Opinion ReportingRecallAssociationBaselineMedia & politicsTeams & management

Omission bias

The tendency to judge harmful inaction as more acceptable, or less blameworthy, than equally harmful action.

Opinion ReportingInertiaPersonal decisionsPublic policy

Social desirability bias

The tendency to over-report socially approved attitudes or behaviors and under-report the ones likely to invite embarrassment, judgment, or sanction.

Opinion ReportingOutcomeSurveys & interviewsTeams & management

Stereotyping

Expecting a member of a group to have certain characteristics without having actual information about that individual

Opinion ReportingOutcome

Third-person effect

A tendency to believe that mass-communicated media messages have a greater effect on others than on themselves

Opinion ReportingSelf-Perspective

Trait ascription bias

The tendency for people to view themselves as relatively variable in terms of personality, behavior, and mood while viewing others as much more predictable

Opinion ReportingSelf-Perspective

Zero-sum bias

Where a situation is incorrectly perceived to be like a zero-sum game, in which any gain by one person necessarily comes at the expense of another

Opinion ReportingSelf-Perspective