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GLAMbox: A Python toolbox for investigating the association between gaze allocation and decision behaviour

Author

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  • Molter, Felix
  • Thomas, Armin W.
  • Heekeren, Hauke R.
  • Mohr, Peter N. C.

Abstract

Recent empirical findings have indicated that gaze allocation plays a crucial role in simple decision behaviour. Many of these findings point towards an influence of gaze allocation onto the speed of evidence accumulation in an accumulation-to-bound decision process (resulting in generally higher choice probabilities for items that have been looked at longer). Further, researchers have shown that the strength of the association between gaze and choice behaviour is highly variable between individuals, encouraging future work to study this association on the individual level. However, few decision models exist that enable a straightforward characterization of the gaze-choice association at the individual level, due to the high cost of developing and implementing them. The model space is particularly scarce for choice sets with more than two choice alternatives. Here, we present GLAMbox, a Python-based toolbox that is built upon PyMC3 and allows the easy application of the gaze-weighted linear accumulator model (GLAM) to experimental choice data. The GLAM assumes gaze-dependent evidence accumulation in a linear stochastic race that extends to decision scenarios with many choice alternatives. GLAMbox enables Bayesian parameter estimation of the GLAM for individual, pooled or hierarchical models, provides an easy-to-use interface to predict choice behaviour and visualize choice data, and benefits from all of PyMC3’s Bayesian statistical modeling functionality. Further documentation, resources and the toolbox itself are available at https://glambox.readthedocs.io.

Suggested Citation

  • 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.
    • Handle: RePEc:zbw:espost:209744
    DOI: 10.1371/journal.pone.0226428
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    References listed on IDEAS

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    1. Tomas Folke & Catrine Jacobsen & Stephen M. Fleming & Benedetto De Martino, 2017. "Explicit representation of confidence informs future value-based decisions," Nature Human Behaviour, Nature, vol. 1(1), pages 1-8, January.
    2. Armin W. Thomas & Felix Molter & Ian Krajbich & Hauke R. Heekeren & Peter N. C. Mohr, 2019. "Gaze bias differences capture individual choice behaviour," Nature Human Behaviour, Nature, vol. 3(6), pages 625-635, June.
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    6. Arkady Konovalov & Ian Krajbich, 2016. "Gaze data reveal distinct choice processes underlying model-based and model-free reinforcement learning," Nature Communications, Nature, vol. 7(1), pages 1-11, November.
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