Many of these biases are studied for how they affect belief formation, business decisions, and scientific research.
Anchoring the common human tendency to rely too heavily, or "anchor," on one trait or piece of information when making decisions.
Attentional Bias implicit cognitive bias defined as the tendency of emotionally salient stimuli in one's environment to preferentially draw and hold attention.
Bandwagon effect the tendency to do (or believe) things because many other people do (or believe) the same. Related to groupthink and herd behavior.
Bias blind spot the tendency to see oneself as less biased than other people.[2]
Choice-supportive bias the tendency to remember one's choices as better than they actually were.
Confirmation bias the tendency to search for or interpret information in a way that confirms one's preconceptions.[3]
Congruence bias the tendency to test hypotheses exclusively through direct testing, in contrast to tests of possible alternative hypotheses.
Contrast effect the enhancement or diminishing of a weight or other measurement when compared with a recently observed contrasting object.[4]
Denomination effect the tendency to spend more money when it is denominated in small amounts (e.g. coins) rather than large amounts (e.g. bills).[5]
Distinction bias the tendency to view two options as more dissimilar when evaluating them simultaneously than when evaluating them separately.[6]
Endowment effect "the fact that people often demand much more to give up an object than they would be willing to pay to acquire it".[7]
Experimenter's or Expectation bias the tendency for experimenters to believe, certify, and publish data that agree with their expectations for the outcome of an experiment, and to disbelieve, discard, or downgrade the corresponding weightings for data that appear to conflict with those expectations.[8]
Extraordinarity bias the tendency to value an object more than others in the same category as a result of an extraordinarity of that object that does not, in itself, change the value.[citation needed]
Focusing effect the tendency to place too much importance on one aspect of an event; causes error in accurately predicting the utility of a future outcome.[9]
Framing effect drawing different conclusions from the same information, depending on how that information is presented.
Hostile media effect - the tendency to see a media report as being biased due to one's own strong partisan views.
Hyperbolic discounting the tendency for people to have a stronger preference for more immediate payoffs relative to later payoffs, where the tendency increases the closer to the present both payoffs are.[10]
Illusion of control the tendency to overestimate one's degree of influence over other external events.[11]
Impact bias the tendency to overestimate the length or the intensity of the impact of future feeling states.[12]
Information bias the tendency to seek information even when it cannot affect action.[13]
Interloper effect the tendency to value third party consultation as objective, confirming, and without motive. Also consultation paradox, the conclusion that solutions proposed by existing personnel within an organization are less likely to receive support than from those recruited for that purpose.
Irrational escalation the phenomenon where people justify increased investment in a decision, based on the cumulative prior investment, despite new evidence suggesting that the decision was probably wrong.
Loss aversion "the disutility of giving up an object is greater than the utility associated with acquiring it".[14] (see also Sunk cost effects and Endowment effect).
Mere exposure effect the tendency to express undue liking for things merely because of familiarity with them.[15]
Money illusion the tendency to concentrate on the nominal (face value) of money rather than its value in terms of purchasing power.[16]
Moral credential effect the tendency of a track record of non-prejudice to increase subsequent prejudice.
Negativity bias the tendency to pay more attention and give more weight to negative than positive experiences or other kinds of information.
Neglect of probability the tendency to completely disregard probability when making a decision under uncertainty.[17]
Normalcy bias the refusal to plan for, or react to, a disaster which has never happened before.
Omission bias the tendency to judge harmful actions as worse, or less moral, than equally harmful omissions (inactions).[18]
Outcome bias the tendency to judge a decision by its eventual outcome instead of based on the quality of the decision at the time it was made.
Planning fallacy the tendency to underestimate task-completion times.[12]
Post-purchase rationalization the tendency to persuade oneself through rational argument that a purchase was a good value.
Pseudocertainty effect the tendency to make risk-averse choices if the expected outcome is positive, but make risk-seeking choices to avoid negative outcomes.[19]
Reactance the urge to do the opposite of what someone wants you to do out of a need to resist a perceived attempt to constrain your freedom of choice.
Restraint bias the tendency to overestimate one's ability to show restraint in the face of temptation.
Selective perception the tendency for expectations to affect perception.
Semmelweis reflex the tendency to reject new evidence that contradicts an established paradigm.[20]
Social comparison bias the tendency, when making hiring decisions, to favour potential candidates who don't compete with one's own particular strengths.[21]
Status quo bias the tendency to like things to stay relatively the same (see also loss aversion, endowment effect, and system justification).[22][23]
Unit bias the tendency to want to finish a given unit of a task or an item. Strong effects on the consumption of food in particular.[24]
Wishful thinking the formation of beliefs and the making of decisions according to what is pleasing to imagine instead of by appeal to evidence or rationality.[25]
Zero-risk bias preference for reducing a small risk to zero over a greater reduction in a larger risk.
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