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The desirability bias in predictions: Going optimistic without leaving realism

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  • Windschitl, Paul D.
  • Smith, Andrew R.
  • Rose, Jason P.
  • Krizan, Zlatan
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    Abstract

    Does desire for an outcome inflate optimism? Previous experiments have produced mixed results regarding the desirability bias, with the bulk of supportive findings coming from one paradigm--the classic marked-card paradigm in which people make discrete predictions about desirable or undesirable cards being drawn from decks. We introduce a biased-guessing account for the effects from this paradigm, which posits that people are often realistic in their likelihood assessments, but when making a subjectively arbitrary prediction (a guess), they will tend to guess in a desired direction. In order to establish the validity of the biased-guessing account and to distinguish it from other accounts, we conducted five experiments that tested the desirability bias within the paradigm and novel extensions of it. In addition to supporting the biased-guessing account, the findings illustrate the critical role of moderators (e.g., type of outcome, type of forecast) for fully understanding and predicting desirability biases.

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    File URL: http://www.sciencedirect.com/science/article/B6WP2-4X6V9X9-1/2/5852b4cb18cfe87f7368455cd8b08e76
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    Bibliographic Info

    Article provided by Elsevier in its journal Organizational Behavior and Human Decision Processes.

    Volume (Year): 111 (2010)
    Issue (Month): 1 (January)
    Pages: 33-47

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    Handle: RePEc:eee:jobhdp:v:111:y:2010:i:1:p:33-47

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    Web page: http://www.elsevier.com/locate/obhdp

    Related research

    Keywords: Desirability bias Wishful thinking Optimism Motivated reasoning Likelihood judgment Subjective probability;

    References

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    1. Hsee, Christopher K., 1996. "The Evaluability Hypothesis: An Explanation for Preference Reversals between Joint and Separate Evaluations of Alternatives," Organizational Behavior and Human Decision Processes, Elsevier, vol. 67(3), pages 247-257, September.
    2. van Dijk, Wilco W. & Zeelenberg, Marcel & van der Pligt, Joop, 2003. "Blessed are those who expect nothing: Lowering expectations as a way of avoiding disappointment," Journal of Economic Psychology, Elsevier, vol. 24(4), pages 505-516, August.
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    Cited by:
    1. Windschitl, Paul D. & Scherer, Aaron M. & Smith, Andrew R. & Rose, Jason P., 2013. "Why so confident? The influence of outcome desirability on selective exposure and likelihood judgment," Organizational Behavior and Human Decision Processes, Elsevier, vol. 120(1), pages 73-86.

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