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    Investigating the difference between surprise and probability judgments

    Maguire, Phil and Maguire, Rebecca (2009) Investigating the difference between surprise and probability judgments. In: Proceedings of the Thirty-First Annual Meeting of the Cognitive Science Society. Lawrence Erlbaum Associates, pp. 2359-2364.

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    Surprise is often defined in terms of disconfirmed expectations, whereby the surprisingness of an event is thought to be dependent on the degree to which that event contrasts with a more likely, or expected, outcome. We propose that surprise is more accurately modelled as a manifestation of an ongoing sense-making process. Specifically, the level of surprise experienced depends on the extent to which an event necessitates representational updating. This sense-making view predicts that differences in subjective probability and surprise arise because of differences in representational specificity rather than differences between an expectation and an outcome. We describe two experiments which support this hypothesis. The results of Experiment 1 demonstrate that generalised representations can allow subjectively low probability outcomes to be integrated without eliciting high levels of surprise, thus providing an explanation for the difference between the two measures. The results of Experiment 2 reveal that the level of contrast between expectation and outcome is not correlated with the difference between probability and surprise. The implications for models of surprise are discussed.

    Item Type: Book Section
    Keywords: Surprise; probability; likelihood judgments; expectation; representation; reasoning;
    Academic Unit: Faculty of Science and Engineering > Computer Science
    Item ID: 10324
    Depositing User: Phil Maguire
    Date Deposited: 13 Dec 2018 15:51
    Publisher: Lawrence Erlbaum Associates
    Refereed: Yes
      Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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