Selective attention and adaptation in an audio-visual temporal order judgment task
Résumé
The encoding of event timing in the brain is crucial to build a coherent and unified representation of the external world. While audio-visual events can be perceived as ‘one’ coherent event, differences in the speeds of light and sound, local transduction and coding circuitry delays, and selective attention contribute to temporal delays that can be captured by asking participants to estimate the temporal order of sensory events. We know that the repeated exposures of a participant to a pair of desynchronized audio-visual stimuli shift individuals’ simultaneity towards the exposed delay e.g. adaptation with a sound followed by a visual event will shift perceived simultaneity towards the sound. In this study, we asked whether such temporal recalibration is valid if the exposed delay is re-referenced to the individual's subjective simultaneity. Second, we tested whether selective attention impacted the direction of the shift. We conducted a behavioral experiment (N = 32) using temporal order judgment and lag-adaptation paradigms. Results did not replicate the literature and an additional experiment will be reported.
Keywords: Temporal order, subjective simultaneity, lag-adaptation, temporal recalibration, and selective attention
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