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{
    "pk": 27728,
    "title": "Comparing models of semantic fluency: Do humans forage optimally, or walk randomly?",
    "subtitle": null,
    "abstract": "Hills, Jones, and Todd (2012) observed that response patterns\nduring the semantic fluency task (e.g., “name all the animals\nyou can in a minute”) display statistical signatures of memory\nsearch that mirror optimal foraging in physical space. They\nproposed a model of memory search based on exploration-\nexploitation tradeoffs known to produce optimal foraging\npatterns when animals search for food resources, applied to a\nspatial model of semantic memory. However, Abbott,\nAusterweil, and Griffiths (2015) demonstrated that optimal\nforaging behavior could also naturally emerge from a random\nwalk applied to a network representation of semantic memory,\nwithout reliance on a foraging process. Since then, this has\nbeen a very active are of debate in the literature, but core\nconfounds have prevented any clear conclusions between the\nrandom walk and cue switching model. We control confounds\nhere by using a fixed training corpus and learning model to\ncreate both spatial and network representations, and evaluate\nthe ability of the cue switching model and several variants of\nthe random walk model to produce the behavioral\ncharacteristics seen in human data. Further, we use BIC to\nquantitatively compare the models’ ability to fit the human\ndata, an obvious comparison that has never before been\nundertaken. The results suggest a clear superiority of the Hills\net al. cue switching model. The mechanism used to search\nmemory in the fluency task is likely to have been exapted from\nmechanisms evolved for foraging in spatial environments.",
    "language": "eng",
    "license": {
        "name": "",
        "short_name": "",
        "text": null,
        "url": ""
    },
    "keywords": [
        {
            "word": "Semantic memory"
        },
        {
            "word": "memory search"
        },
        {
            "word": "model"
        }
    ],
    "section": "Publication-based-Talks",
    "is_remote": true,
    "remote_url": "https://escholarship.org/uc/item/8tz9m7sc",
    "frozenauthors": [
        {
            "first_name": "Johnathan",
            "middle_name": "E",
            "last_name": "Avery",
            "name_suffix": "",
            "institution": "Indiana University",
            "department": ""
        },
        {
            "first_name": "Michael",
            "middle_name": "N",
            "last_name": "Jones",
            "name_suffix": "",
            "institution": "Indiana University",
            "department": ""
        }
    ],
    "date_submitted": null,
    "date_accepted": null,
    "date_published": "2018-01-01T18:00:00Z",
    "render_galley": null,
    "galleys": [
        {
            "label": "PDF",
            "type": "pdf",
            "path": "https://journalpub.escholarship.org/cognitivesciencesociety/article/27728/galley/17368/download/"
        }
    ]
}