15:00 - 16:30
Mon-P2-Poster I-1
Mon-Poster I-1
Room: P2
Frequency-dependent perception of auditory apparent motion
Mon-P2-Poster I-104
Presented by: Meike Kriegeskorte
Meike Kriegeskorte, Elisabeth Hein
University of Tübingen
We can perceive objects as moving by connecting them across space and time. This is possible even when the objects are not present continuously, as in the case of apparent motion displays like the Ternus Display. In this display, two stimuli are presented, one at the centre and one shifted to the left, followed by an empty interval, after which two stimuli are presented, one at the centre and one to the right. This display is ambiguous, as depending on which stimuli are connected, it can be perceived as both stimuli moving uniformly to the right (group motion) or one stimulus moving across the stationary centre stimulus (element motion). Which percept is seen can be influenced by the interstimulus interval (ISI) of the empty frame and the stimulus features. Recently, Wang et al. (2014) showed that the Ternus effect also exists in the auditory domain and that the percept is dependent on the ISI. This evidence suggests similar mechanisms in the visual and auditory domain. To explore this idea, we investigated whether the auditory Ternus effect is also dependent on the stimulus features by creating a bias based on frequency. This bias was either compatible with element motion by presenting the outer tones in the same frequency or with group motion by presenting the first tone in each frame in the same frequency. Our results showed an influence of this frequency bias, suggesting that both domains might use the same mechanism to connect objects across space and time.
Keywords: apparent motion, auditory perception, correspondence problem