Abstract
Visual search (VS) is a fundamental task in daily life widely studied for over half a century. A variant of the classic paradigm—searching one target among distractors—requires the observer to look for several (undetermined) instances of a target (so-called foraging) or several targets that may appear an undefined number of times (recently named as hybrid foraging). In these searches, besides looking for targets, the observer must decide how much time is needed to exploit the area, and when to quit the search to eventually explore new search options. In fact, visual foraging is a very common search task in the real world, probably involving additional cognitive functions than typical VS. It has been widely studied in natural animal environments, for which several mathematical models have been proposed, and just recently applied to humans: Lévy processes, composite and area-restricted search models, marginal value theorem, and Bayesian learning (among others). We conducted a systematic search in the literature to understand those mathematical models and study its applicability in human visual foraging. The review suggests that these models might be the first step, but they seem to be limited to fully comprehend foraging in visual search. There are essential variables involving human visual foraging still to be established and understood. Indeed, a jointly theoretical interpretation based on the different models reviewed could better account for its understanding. In addition, some other relevant variables, such as certain individual differences or time perception might be crucial to understanding visual foraging in humans.
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The present work has been supported by the financed research project of the “Ministerio de Economía y Competitividad de España, Dirección General de Investigación Científica y Técnica”. Ref. PSI2015-69358-R. Granted to IP Beatriz Gil-Gómez de Liaño.
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Marcos Bella-Fernández declares that he has no conflict of interest. Manuel Suero Suñé declares that he has no conflict of interest. Beatriz Gil-Gómez de Liaño declares that she has no conflict of interest.
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Bella-Fernández, M., Suero Suñé, M. & Gil-Gómez de Liaño, B. Foraging behavior in visual search: A review of theoretical and mathematical models in humans and animals. Psychological Research 86, 331–349 (2022). https://doi.org/10.1007/s00426-021-01499-1
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DOI: https://doi.org/10.1007/s00426-021-01499-1