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.

Poster illustration for Anthropocentric thinking

Anthropocentric thinking

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

Opinion ReportingSelf-Perspective
Poster illustration for Anthropomorphism

Anthropomorphism

The tendency to treat animals, objects, or abstractions as if they had human thoughts, feelings, or intentions.

Opinion ReportingSelf-Perspective
Poster illustration for Backfire effect

Backfire effect

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

Opinion ReportingInertia
Poster illustration for Bandwagon effect

Bandwagon effect

The tendency to do things because many other people do the same.

Opinion ReportingOutcome
Poster illustration for Ben Franklin effect

Ben Franklin effect

The tendency to like or help someone more after already doing that person a favor.

Opinion ReportingSelf-Perspective
Poster illustration for Bias blind spot

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
Poster illustration for Courtesy bias

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
Poster illustration for End-of-history illusion

End-of-history illusion

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

Opinion ReportingInertia
Poster illustration for Halo effect

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
Poster illustration for Illusion of learning

Illusion of learning

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

Opinion ReportingOutcome
Poster illustration for Illusory superiority

Illusory superiority

The tendency to overestimate one's desirable qualities, and underestimate undesirable qualities, relative to other people.

Opinion ReportingSelf-Perspective
Poster illustration for Impostor Syndrome

Impostor Syndrome

The tendency to doubt one's competence and fear being exposed as a fraud despite evidence of ability.

Opinion ReportingSelf-Perspective
Poster illustration for Moral credential

Moral credential

The tendency to treat a prior good deed as permission for later worse behavior.

Opinion ReportingAssociation
Poster illustration for Moral luck

Moral luck

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

Opinion ReportingOutcome
Poster illustration for Naïve realism

Naïve realism

The tendency to see one's own view as plain reality and disagreement as ignorance, bias, or irrationality.

Opinion ReportingSelf-PerspectiveMedia & politicsConflict & dialogue
Poster illustration for Negativity bias

Negativity bias

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

Opinion ReportingRecallAssociationBaselineMedia & politicsTeams & management
Poster illustration for Omission bias

Omission bias

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

Opinion ReportingInertiaPersonal decisionsPublic policy
Poster illustration for Social desirability bias

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
Poster illustration for Stereotyping

Stereotyping

The tendency to assign group-based traits to an individual without enough individual evidence.

Opinion ReportingOutcome
Poster illustration for Third-person effect

Third-person effect

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

Opinion ReportingSelf-Perspective
Poster illustration for Trait ascription bias

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
Poster illustration for Zero-sum bias

Zero-sum bias

The tendency to see situations as zero-sum even when gains for one need not mean losses for another.

Opinion ReportingSelf-Perspective