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{
    "pk": 33037,
    "title": "A Capacity Approach to Kinematic Illusions: The Curtate Cycloid Illusion in the Perception of Rolling Motion",
    "subtitle": null,
    "abstract": "When a wheel rolls along a flat surface, a point on its \nperimeter traces a cycloid trajectory. However, subjects \nperceive the point's path not as the cycloid, but as the \ncurtate cycloid, containing loops where the point \ncontacts the surface. This is the curtate cycloid \nillusion. I hypothesize that the illusion occurs because \nthe cognitive system does not have sufficient activation, \nor capacity, to both maintain an updated representation \nof the wheel's translation and compute its instant \ncenters, the point about which the wheel is rotating at a \ngiven instant. This hypothesis is supported by \nshowing that illusion susceptibility is decreased when \nthe competing instant center demand is reduced, either \nby giving subjects practice at instant center \ncomputation (Experiment 1) or by eliminating the \ncontour containing the instant centers subjects are most \nlikely to compute (Experiment 2). Experiment 3 \ndemonstrates that heightened instant center demands \nhave less effect on illusion susceptibility when they are \nconfined to irrelevant portions of the wheel's contour. \nA general form of the capacity account may explain \nillusions in the perception of many kinematic systems \nand point the way toward theoretical unity in the study \nof the perception of motion and events.",
    "language": "eng",
    "license": {
        "name": "",
        "short_name": "",
        "text": null,
        "url": ""
    },
    "keywords": [],
    "section": "17",
    "is_remote": true,
    "remote_url": "https://escholarship.org/uc/item/4qb8q23t",
    "frozenauthors": [
        {
            "first_name": "Matthew",
            "middle_name": "I.",
            "last_name": "Isaak",
            "name_suffix": "",
            "institution": "University of Calgary",
            "department": ""
        }
    ],
    "date_submitted": null,
    "date_accepted": null,
    "date_published": "1995-01-01T18:00:00Z",
    "render_galley": null,
    "galleys": [
        {
            "label": "PDF",
            "type": "pdf",
            "path": "https://journalpub.escholarship.org/cognitivesciencesociety/article/33037/galley/24099/download/"
        }
    ]
}