Occluded motion alters event perception

Yousuke Kawachi, Jiro Gyoba

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)


    We employed audiovisual stream/bounce displays, in which two moving objects with crossing trajectories are more likely to be perceived as bouncing off, rather than streaming through, each other when a brief sound is presented at the coincidence of the two objects. However, Kawachi and Gyoba (Perception 35:1289-1294, 2006b) reported that the presence of an additional moving object near the two objects altered the perception of a bouncing event to that of a streaming event. In this study, we extended this finding and examined whether alteration of the event perception could be induced by the visual context, such as by occluded object motion near the stream/bounce display. The results demonstrated that even when the sound was presented, the continuous occluded motion strongly biased observers' percepts toward the streaming percept during a short occlusion interval (approximately 100 ms). In contrast, when the continuous occluded motion was disrupted by introducing a spatiotemporal gap in the motion trajectory or by removing occlusion cues such as deletion/accretion, the bias toward the streaming percept declined. Thus, we suggest that a representation of object motion generated under a limited occlusion interval interferes with audiovisual event perception.

    Original languageEnglish
    Pages (from-to)491-500
    Number of pages10
    JournalAttention, Perception, and Psychophysics
    Issue number3
    Publication statusPublished - 2013 Apr 15


    • Crossmodal interaction
    • Occluded motion
    • Streaming/bouncing event perception

    ASJC Scopus subject areas

    • Language and Linguistics
    • Experimental and Cognitive Psychology
    • Sensory Systems
    • Linguistics and Language


    Dive into the research topics of 'Occluded motion alters event perception'. Together they form a unique fingerprint.

    Cite this