September 2018
Volume 18, Issue 10
Open Access
Vision Sciences Society Annual Meeting Abstract  |   September 2018
Implicit ensemble bias in feature recall
Author Affiliations
  • Ke Tong
    University of South Florida
  • Chad Dubé
    University of South Florida
Journal of Vision September 2018, Vol.18, 833. doi:
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      Ke Tong, Chad Dubé; Implicit ensemble bias in feature recall. Journal of Vision 2018;18(10):833.

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      © ARVO (1962-2015); The Authors (2016-present)

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Ensemble representation is thought to facilitate visual processing and avoid information overload, but it may also bias the representation of individual items. When asked to adjust a probe to match the feature of a single target stimulus, subjects' responses were biased towards the mean of previously viewed but task-irrelevant stimuli, without any explicit requirement of engaging ensemble representation. We asked whether this obligatory bias towards the mean occurs across different categories of stimuli and tested it using two visual features (line length and spatial frequency). Our results showed that the bias towards the mean was evident in spatial frequency. However, we did not find a consistent bias towards the mean in line length in multiple conditions with different starting probe values, probe locations, and distributions of the overall stimuli. This may suggest a specificity of stimulus type of the implicit ensemble bias.

Meeting abstract presented at VSS 2018


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