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{
    "pk": 5669,
    "title": "Use of Spatial Dimensions in Pattern Discrimination and Similarity Judgments by Pigeons",
    "subtitle": null,
    "abstract": "Two experiments examined the role of spatial dimensions in pattern discrimination and judgment of similarity by pigeons. In Experiment 1, pigeons were given a symbolic matching-to-sample task in which they first learned to discriminate between two patterns (A and B) that differed in the spatial layout of an arrow inside a circle divided into four quadrants. The first training stimulus contained an arrow inside the Top Left quadrant and the tip of the arrow was pointing toward 90 degrees. The second training stimulus contained an arrow inside the Bottom Left quadrant and the arrow was pointed downwards at 180 degrees. Fourteen new patterns, consisting of all the remaining combinations of arrow orientations and arrow locations (quadrants), were then presented and their categorization by the pigeons was examined. The results showed that the two dimensions pertaining to the position of the arrow (Top/Bottom and Left/Right halves of the circle) and their interactions were more salient than the two dimensions pertaining to its orientation (Horizontal / Vertical arrows and two arrow ends). Experiment 2 showed that the position of a pattern component was encoded and used in similarity judgments even when the A and B differed along nonspatial dimensions (a rectangle vs a circle). When pigeons encountered new visual patterns and judged their similarity to old ones, they privileged the position of the pattern components over shape in their judgments.",
    "language": "en",
    "license": {
        "name": "Creative Commons Attribution 4.0",
        "short_name": "CC BY 4.0",
        "text": "Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.\r\n\r\nNo additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.",
        "url": "https://creativecommons.org/licenses/by/4.0"
    },
    "keywords": [
        {
            "word": "International Journal of Comparative Psychology"
        },
        {
            "word": "Behavior"
        },
        {
            "word": "Behaviour"
        },
        {
            "word": "learning"
        },
        {
            "word": "Behavioral Taxonomy"
        },
        {
            "word": "cognition"
        },
        {
            "word": "Cognitive Processes"
        },
        {
            "word": "Intelligence"
        },
        {
            "word": "Choice"
        },
        {
            "word": "Pattern Discrimination"
        },
        {
            "word": "Spatial Dimensions"
        },
        {
            "word": "Similarity"
        },
        {
            "word": "Pigeons"
        }
    ],
    "section": "Research Article",
    "is_remote": true,
    "remote_url": "https://escholarship.org/uc/item/1dg7j92d",
    "frozenauthors": [
        {
            "first_name": "France",
            "middle_name": "",
            "last_name": "Landry",
            "name_suffix": "",
            "institution": "University of Ottawa, Canada",
            "department": "None"
        },
        {
            "first_name": "Catherine",
            "middle_name": "",
            "last_name": "Plowright",
            "name_suffix": "",
            "institution": "University of Ottawa, Canada",
            "department": "None"
        }
    ],
    "date_submitted": "2009-05-05T07:00:00Z",
    "date_accepted": "2009-05-05T07:00:00Z",
    "date_published": "2001-12-31T08:00:00Z",
    "render_galley": null,
    "galleys": [
        {
            "label": "",
            "type": "",
            "path": "https://journalpub.escholarship.org/uclapsych_ijcp/article/5669/galley/3424/download/"
        }
    ]
}