PSYCHOLOGY MASTER'S THESIS ABSTRACT

Tammy Hinkle

Industrial/Organizational
August 1990

Cues to Auditory Apparent Motion in Free Space

    This research was conducted to determine if auditory apparent motion could be perceived in depth-perception settings.  Listener perception was analyzed across ISOI, trajectory, type of trajectory and direction of trajectory.  Subjects listed to pairs of broadband signals and indicated whether motion was perceived and identified either direction of motion or temporal sequence of signals.  Results indicated that signals presented in direction-only trajectories were easier to identify than signals presented in depth-direction or direction-only trajectories.  Significant interaction effects suggest that interaural information is critical to identifying direction of motion in depth or depth-direction conditions.  In accordance with published research, lower ISOIs and trajectories providing interaural information best evoked motion responses.  Motion was perceived in depth conditions, but less often and listeners’ accuracy of motion direction was poor.  Motion detected in the absence of interaural information may be processed differently than motion detected with interaural information.

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