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Related Concept Videos

Bias01:22

Bias

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Bias refers to any tendency that prevents a question from being considered unprejudiced. In research, bias occurs when one outcome or answer is selected or encouraged over others in sampling or testing. Bias can occur during any research phase, including study design, data collection, analysis, and publication.
In statistics, a sampling bias is created when a sample is collected from a population, and some members of the population are not as likely to be chosen as others (remember, each member...
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Unrealistic optimism bias is the tendency to overestimate the likelihood of positive outcomes. This cognitive bias makes individuals believe they are less likely to experience failures, setbacks, or risks and more likely to succeed than others. For example, people may assume they are less prone to health issues, accidents, or financial struggles than their peers, even when they share similar risk factors.One key component of this bias is the above-average effect, where individuals perceive...
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Hindsight bias leads you to believe that the event you just experienced was predictable, even though it really wasn’t. In other words, you knew all along that things would turn out the way they did. Can you relate this to the phrase "Hindsight is 20/20" now? 
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Cognitive bias results from limitations in thinking and information processing, leading to systematic errors in judgment. Conversely, motivational bias stems from personal desires or emotions, causing distortions in perception to align with self-interest. Motivational bias influences how individuals perceive and attribute causes to events, often shaped by personal needs, goals, and self-esteem preservation. This bias can distort judgment, leading to inaccurate assessments of success, failure,...
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The Representativeness Heuristic02:13

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The representative heuristic describes a biased way of thinking, in which you unintentionally stereotype someone or something. For example, you may assume that your professors spend their free time reading books and engaging in intellectual conversation, because the idea of them spending their time playing volleyball or visiting an amusement park does not fit in with your stereotypes of professors.
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The halo effect is a cognitive bias in which an individual's overall impression influences judgments about their specific traits. This psychological phenomenon leads people to associate positive characteristics with those they perceive as generally good and negative characteristics with those they view as bad. This effect is particularly influential in social perception, professional evaluations, and decision-making processes.The Psychological Basis of the Halo EffectThe halo effect is rooted...
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How cognitive biases affect winning probability perception in beach volleyball experts.

Sandra Ittlinger1, Steffen Lang2, Antonia Schubert1,3

  • 1Department of Performance Psychology, German Sport University Cologne, Cologne, Germany.

Scientific Reports
|September 11, 2025
PubMed
Summary

Beach volleyball players overestimate winning chances when trailing and underestimate them when leading. Cognitive biases like optimism and confirmation bias significantly influence these perceptions, impacting game strategy.

Keywords:
Beach VolleyballConfirmation biasDecision making in SportElite sportOptimism biasWinning Probability Perception

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Area of Science:

  • Sport Psychology
  • Sport Informatics
  • Behavioral Economics

Background:

  • The "never give up" mentality in beach volleyball is prevalent but lacks strategic analysis.
  • Accurate perception of set-winning probabilities (SWPs) is vital for in-game decision-making and performance optimization.

Purpose of the Study:

  • To investigate how cognitive biases and adaptive strategies affect beach volleyball players' perception of set-winning probabilities (SWPs).
  • To analyze SWP estimations in scenarios of significant leads or deficits.

Main Methods:

  • A mixed-methods approach combining sport psychology and informatics.
  • 43 German national team players estimated SWPs for 60 game scores.
  • Questionnaires assessed optimism, pessimism, confirmation bias, and sunk cost fallacy.
  • Empirical SWPs were derived from 6,571 match data.

Main Results:

  • Players significantly overestimated SWPs when trailing and underestimated them when leading.
  • Optimism and confirmation bias were key factors influencing SWP estimations.
  • Confirmation bias had a dual effect: increasing overestimation when trailing and improving accuracy when leading.

Conclusions:

  • Psychological factors significantly distort SWP estimations in competitive beach volleyball.
  • Understanding these biases is crucial for developing effective in-game strategies and enhancing player performance.
  • Players' recall is biased towards reinforcing beliefs of potential victory.