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The Abilene paradox occurs when a group collectively decides on a course of action that no individual member actually wants, because each person mistakenly believes the others want it and goes along to avoid conflict. Where groupthink is convergence on a leader's or majority's view, Abilene is unanimous agreement to something nobody prefers.
Absent-mindedness is a cognitive bias that refers to instances where a lack of attention results in forgetfulness or lapses in memory, which often affects the retention and recall of information. This phenomenon is typically categorized under 'What to remember,' and is further understood through how memories can be stored differently based on experience.
The actor–observer bias is the tendency to attribute our own behavior to situational factors while attributing other people's behavior to their character. When I miss a deadline, it's because the week was chaotic; when you miss one, it's because you're disorganized.
The Ben Franklin effect is the tendency to like someone more after doing them a favor — rather than only doing favors for people we already like. The causal arrow runs backward from folk intuition: behavior shapes attitude.
The bystander effect is the tendency for individuals to be less likely to help — or act at all — when other people are present. Responsibility diffuses across the group, everyone assumes someone else will step in, and each person reads the others' inaction as evidence that action isn't needed.
The Cheerleader Effect, also known as the group attractiveness effect, is a cognitive bias where people perceive individuals as more attractive when they are in a group compared to when they are alone. This phenomenon gained popular attention partly due to its mention in popular media but is backed by scientific observations.
The cross-race effect, also known as own-race bias, refers to the tendency for people to more easily recognize faces of their own race compared to faces of other races. This cognitive bias is prevalent in facial recognition tasks and has significant implications in various fields, such as criminal justice, psychological research, and social interactions.
Decision fatigue is the claimed deterioration in decision quality after a long sequence of decisions: later choices drift toward defaults, avoidance, and impulsivity as the effort of active deciding accumulates. It is practically influential — and scientifically contested.
Distinction bias is a cognitive bias that occurs when people perceive two options as more dissimilar when evaluating them simultaneously than when evaluating them separately. This bias leads individuals to overemphasize minor differences while neglecting overall similarities.
The end-of-history illusion is the tendency to believe that who we are right now is who we will remain — that our present values, preferences, and personality are the finished product, even while readily acknowledging how much we've changed in the past. At every age, people report substantial past change and predict minimal future change.
Essentialism is a cognitive bias where individuals believe that certain categories, such as people, animals, or objects, have an inherent essence that gives them their identity. This bias often leads to overgeneralization and stereotyping, as individuals attribute fixed traits to members of these categories.
Extrinsic incentive error is a cognitive bias where people tend to overestimate the influence of extrinsic incentives (such as money or rewards) on others' behaviors, while undervaluing intrinsic motivations (like personal satisfaction or enjoyment). It can lead to a misunderstanding of why people perform certain actions or participate in activities.
Groupthink is a mode of thinking in cohesive groups where the desire for harmony and consensus overrides realistic appraisal of alternatives. Members self-censor doubts, dissenters are pressured, and the group converges on a decision that many individuals privately question — while feeling more confident than any of them would alone.
The halo effect is letting one positive trait — attractiveness, prestige, polish, friendliness, a famous brand — spill into judgments about unrelated traits. A good first impression quietly becomes evidence of competence, honesty, or quality.
Hostile attribution bias is the tendency to interpret ambiguous behavior by others as intentionally hostile. The bumped shoulder, the unanswered email, the terse comment — where intent is unclear, the biased reading defaults to malice, and the response escalates accordingly.
The implicit associations cognitive bias refers to the automatic associations some individuals hold about groups of people, ingrained at an unconscious level. These associations can influence attitudes, judgments, and behaviors, often without the individual being aware of them. This bias falls under the broader category of implicit stereotypes, which are the unconscious beliefs and attitudes toward particular groups based on race, gender, age, or other factors.
In-group bias is favoring people we see as 'us' over people we see as 'them,' even when group membership is arbitrary and the evidence about individuals is equivalent. Belonging can quietly become a proxy for trust, competence, and deservingness.
The overjustification effect is the tendency for extrinsic rewards to undermine intrinsic motivation: pay someone for what they already loved doing, and once the payment stops — or even while it continues — the love can fade. The activity's explanation shifts from 'I do this because I enjoy it' to 'I do this for the reward.'
The Pygmalion effect is the phenomenon whereby higher expectations placed on a person lead to improved performance by that person. Expectations leak through behavior — attention, challenge, feedback, warmth — and become self-fulfilling; its dark twin, the Golem effect, is underperformance produced by low expectations.
Self-consistency bias is a cognitive bias where individuals mistakenly believe that their attitudes, beliefs, and behaviors have remained consistent over time. This bias can lead to distorted perceptions of one's past and future actions, often projecting current beliefs or emotional states back into the past and anticipated into the future. It fits into the broader category of 'Lack of meaning,' where individuals impose consistency to maintain a coherent self-image.
Shared information bias is the tendency of groups to spend their discussion time on information all members already know, while the unique knowledge held by individual members — often the information that would change the decision — never surfaces. Groups exist to pool knowledge, and this bias is precisely the failure to pool.
Social comparison bias is devaluing or avoiding people who threaten our relative status, especially when we control an opportunity they could receive. A stronger candidate can feel like a risk to the self rather than an asset to the group.
Social desirability bias is a cognitive bias where individuals tend to answer questions or behave in ways they perceive as being more socially acceptable, rather than being truthful or authentic. This often results in skewed data in surveys, interviews, and research, as people provide responses they believe will make them look favorable in the eyes of others.
The Spotlight Effect is a cognitive bias where individuals overestimate the degree to which their actions and appearance are noticed by others. It is part of a broader category of biases related to a lack of meaning and belongs to the subgroup of knowing what others are thinking. The term refers to the mental 'spotlight' individuals feel that they believe highlights their flaws and mistakes in front of others.
Stereotyping is using a broad belief about a group to infer traits, ability, motives, or behavior in a particular person. A category replaces individual evidence, often with more confidence than the evidence can support.
System justification is the tendency to defend, rationalize, and see as legitimate the existing social, economic, and organizational arrangements one lives under — even when those arrangements work against one's own interests. The status quo isn't just preferred; it gets moralized.
Time-saving bias refers to a common cognitive distortion where individuals struggle to accurately assess the amount of time saved when using faster methods or processes. This misjudgment often leads people to overestimate the time saved by speeding up tasks that are already quick and underestimate the time saved by accelerating slower tasks.