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Testing necessary regional frontal contributions to value assessment and fixation-based updating

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  • Avinash R. Vaidya

    (Montreal Neurological Institute, McGill University)

  • Lesley K. Fellows

    (Montreal Neurological Institute, McGill University)

Abstract

Value-based decisions are biased by the time people spend viewing each option: Options fixated longer are chosen more often, even when previously rated as less appealing. This bias is thought to reflect ‘value updating’ as new evidence is accumulated. Prior work has shown that ventromedial prefrontal cortex (PFC) carries a fixation-dependent value comparison signal, while other studies implicate dorsomedial PFC in representing the value of alternative options. Here, we test whether these regions are necessary for fixation-related value updating in 33 people with frontal lobe damage and 27 healthy controls performing a simple choice task. We show that damage to dorsomedial PFC leads to an exaggerated influence of fixations on choice, while damage to ventromedial or lateral PFC has no effect on this bias. These findings suggest a critical role for dorsomedial, and not ventromedial PFC, in mediating the relative influence of current fixations and a priori value on choice.

Suggested Citation

  • Avinash R. Vaidya & Lesley K. Fellows, 2015. "Testing necessary regional frontal contributions to value assessment and fixation-based updating," Nature Communications, Nature, vol. 6(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms10120
    DOI: 10.1038/ncomms10120
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    Cited by:

    1. Molter, Felix & Thomas, Armin W. & Heekeren, Hauke R. & Mohr, Peter N. C., 2019. "GLAMbox: A Python toolbox for investigating the association between gaze allocation and decision behaviour," EconStor Open Access Articles and Book Chapters, ZBW - Leibniz Information Centre for Economics, vol. 14(12), pages 1-23.
    2. Thomas, Armin W. & Molter, Felix & Krajbich, Ian & Heekeren, Hauke R. & Mohr, Peter N. C., 2019. "Gaze bias differences capture individual choice behaviour," EconStor Open Access Articles and Book Chapters, ZBW - Leibniz Information Centre for Economics, vol. 3(6), pages 625-635.
    3. Stephanie M. Smith & Ian Krajbich & Ryan Webb, 2019. "Estimating the dynamic role of attention via random utility," Journal of the Economic Science Association, Springer;Economic Science Association, vol. 5(1), pages 97-111, August.

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