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{
    "pk": 26414,
    "title": "A Computational Model of Perceptual Deficits in Medial Temporal Lobe Amnesia",
    "subtitle": null,
    "abstract": "Damage to the Medial Temporal Lobe (MTL) impairs declar-\native memory and perception. The Representational-Hierar-\nchical (RH) Account explains such impairments by assuming\nthat MTL stores conjunctive representations of items and\nevents, and that individuals with MTL damage must rely upon\nrepresentations of simple visual features in posterior visual\ncortex. A recent study revealed a surprising anti-perceptual\nlearning effect in MTL-damaged individuals: with exposure to\na set of visual stimuli, discrimination performance worsened\nrather than improved. We expand the RH account to explain\nthis paradox by assuming that visual discrimination is per-\nformed using a familiarity heuristic. Exposure to a set of highly\nsimilar stimuli entails repeated presentation of simple visual\nfeatures, eventually rendering all feature representations\nequally (maximally) familiar and hence inutile for solving the\ntask. Since the unique conjunctions represented in MTL do not\noccur repeatedly, healthy individuals are shielded from this\nperceptual interference. We simulate this mechanism with a\nneural network previously used to simulate recognition\nmemory, thereby providing a model that accounts for both\nmnemonic and perceptual deficits caused by MTL damage us-\ning a unified architecture and mechanism.",
    "language": "eng",
    "license": {
        "name": "",
        "short_name": "",
        "text": null,
        "url": ""
    },
    "keywords": [
        {
            "word": "Neural Network; memory; visual perception; Me-\ndial Temporal Lobe; hierarchical object representations"
        }
    ],
    "section": "Papers",
    "is_remote": true,
    "remote_url": "https://escholarship.org/uc/item/4578d8qs",
    "frozenauthors": [
        {
            "first_name": "Patrick",
            "middle_name": "",
            "last_name": "Sadil",
            "name_suffix": "",
            "institution": "University of Massachusetts",
            "department": ""
        },
        {
            "first_name": "Rosemary",
            "middle_name": "A.",
            "last_name": "Cowell",
            "name_suffix": "",
            "institution": "University of Massachusetts",
            "department": ""
        }
    ],
    "date_submitted": null,
    "date_accepted": null,
    "date_published": "2016-01-01T18:00:00Z",
    "render_galley": null,
    "galleys": [
        {
            "label": "PDF",
            "type": "pdf",
            "path": "https://journalpub.escholarship.org/cognitivesciencesociety/article/26414/galley/16050/download/"
        }
    ]
}