December 2022
Volume 22, Issue 14
Open Access
Vision Sciences Society Annual Meeting Abstract  |   December 2022
Robust changes in confidence efficiency during post-decision time windows
Author Affiliations & Notes
  • Tarryn Balsdon
    Ecole Normale Superieure and CNRS
    Ecole Normale Superieure and INSERM
  • Valentin Wyart
    Ecole Normale Superieure and INSERM
  • Pascal Mamassian
    Ecole Normale Superieure and CNRS
  • Footnotes
    Acknowledgements  This project was supported by funding from “FrontCog” ANR-17-EURE-0017, INSERM (Inserm U960), the CNRS (CNRS UMR 8248) and ANR-18-CE28-0015 grant ‘VICONTE’.
Journal of Vision December 2022, Vol.22, 3251. doi:
  • Views
  • Share
  • Tools
    • Alerts
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Tarryn Balsdon, Valentin Wyart, Pascal Mamassian; Robust changes in confidence efficiency during post-decision time windows. Journal of Vision 2022;22(14):3251.

      Download citation file:

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

  • Supplements

Perceptual decisions are accompanied by feelings of confidence that reflect decision validity. Though these feelings of confidence rely on perceptual evidence, dissociations between confidence and perceptual sensitivity are common. One explanation for these dissociations is that confidence utilises ongoing processing after the completion of perceptual decision processes (Pleskac and Busemeyer, 2010, Psych Rev). Here we demonstrate causal evidence for this claim by showing robust differences in confidence efficiency depending on the duration of post-decision time windows. We measured confidence efficiency using a forced-choice design: human observers chose which of two consecutive perceptual decisions was more likely to be correct. Post-decision time pressure was manipulated (whilst leaving stimulus presentation duration constant) by forcing observers to wait to enter their response, or cueing them to respond almost immediately (leaving limited time for ongoing processing before the next trial). This manipulation had limited effects on perceptual sensitivity, but large effects on confidence efficiency. The effect on confidence efficiency depended on the level of processing of the perceptual decision. For high-level perceptual decisions (discriminating the direction of gaze of an avatar face), confidence efficiency benefitted from additional time. But for low-level perceptual decisions about the same stimuli (discriminating the relative contrast of the eyes’ irises), confidence efficiency diminished with time. Over five experiments, we demonstrate the effect of perceptual decision-level within-subjects (Exp. 1 and 2) and the effect of time pressure within-subjects (Exp. 3 and 4). In Experiment 5, we generalise these findings to biological motion stimuli. Robust differences in confidence efficiency can be generated within-subjects, independently of perceptual sensitivity, by manipulating post-decision time windows. These results suggest that confidence strongly relies on the post-decisional processing of ongoing internal representations, that quickly degrade for low-level perception.


This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.