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{
    "pk": 26979,
    "title": "Inferring Human Interaction from Motion Trajectories in Aerial Videos",
    "subtitle": null,
    "abstract": "People are adept at perceiving interactions from movementsof simple shapes but the underlying mechanism remains un-known. Previous studies have often used object movementsdefined by experimenters. The present study used aerial videosrecorded by drones in a real-life environment to generate de-contextualized motion stimuli. Motion trajectories of dis-played elements were the only visual input. We measuredhuman judgments of interactiveness between two moving el-ements, and the dynamic change of such judgments over time.A hierarchical model was developed to account for human per-formance in this task, which represents interactivity using la-tent variables, and learns the distribution of critical movementfeatures that signal potential interactivity. The model providesa good fit to human judgments and can also be generalized tothe original Heider-Simmel animations (1944). The model canalso synthesize decontextualized animations with controlleddegree of interactiveness, providing a viable tool for studyinganimacy and social perception.",
    "language": "eng",
    "license": {
        "name": "",
        "short_name": "",
        "text": null,
        "url": ""
    },
    "keywords": [
        {
            "word": "social interaction; motion; decontextualized ani-mation; hierarchical model; action understanding"
        }
    ],
    "section": "Talks: Papers",
    "is_remote": true,
    "remote_url": "https://escholarship.org/uc/item/42f98263",
    "frozenauthors": [
        {
            "first_name": "Tianmin",
            "middle_name": "",
            "last_name": "Shu",
            "name_suffix": "",
            "institution": "University of California, Los Angeles",
            "department": ""
        },
        {
            "first_name": "Yujia",
            "middle_name": "",
            "last_name": "Peng",
            "name_suffix": "",
            "institution": "University of California, Los Angeles",
            "department": ""
        },
        {
            "first_name": "Lifeng",
            "middle_name": "",
            "last_name": "Fan",
            "name_suffix": "",
            "institution": "University of California, Los Angeles",
            "department": ""
        },
        {
            "first_name": "Hongjing",
            "middle_name": "",
            "last_name": "Lu",
            "name_suffix": "",
            "institution": "University of California, Los Angeles",
            "department": ""
        },
        {
            "first_name": "Song-Chun",
            "middle_name": "",
            "last_name": "Zhu",
            "name_suffix": "",
            "institution": "University of California, Los Angeles",
            "department": ""
        }
    ],
    "date_submitted": null,
    "date_accepted": null,
    "date_published": "2017-01-01T18:00:00Z",
    "render_galley": null,
    "galleys": [
        {
            "label": "PDF",
            "type": "pdf",
            "path": "https://journalpub.escholarship.org/cognitivesciencesociety/article/26979/galley/16615/download/"
        }
    ]
}