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The role of multisensory interplay in enabling temporal expectations
Felix Ball1, Lara E Michels2, Carsten Thiele2
1Department of Biological Psychology, Otto-von-Guericke University, Magdeburg, Germany; Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany; Center of Behavioural Brain Sciences, Otto-von-Guericke University, Magdeburg, Germany.
Cognition
|October 10, 2017
Summary
Temporal regularities enhance multisensory perception. This study shows that temporal expectation (TE) benefits multisensory processing more than unisensory processing, especially with higher uncertainty.
Area of Science:
- Cognitive Neuroscience
- Perception Psychology
- Multisensory Integration
Background:
- Temporal regularities guide attention and enhance perceptual processing in unisensory contexts.
- Real-world scenarios involve complex multisensory event streams, necessitating investigation into multisensory temporal expectation.
Purpose of the Study:
- To investigate whether temporal expectations enhance perception in multisensory contexts.
- To compare multisensory temporal expectation (TE) effects with unisensory TE effects.
- To examine the influence of spatial and modality-specific uncertainty on TE.
Main Methods:
- A discrimination paradigm with near-threshold targets and distractor sequences was used.
- Target occurrence likelihood (early/late) was manipulated block-wise.
- Perceptual sensitivity (d') and response times (RT) were measured under varying spatial and modality-specific uncertainty.
Main Results:
- Hidden temporal regularities consistently improved performance for expected multisensory targets.
- Multisensory performance was robust to spatial and modality-specific uncertainty, unlike unisensory TE.
- The magnitude of TE effects (increased sensitivity, decreased RT) scaled linearly with target likelihood.
Conclusions:
- Participants rapidly adapt to temporal contexts and benefit from multisensory stimulation.
- Multisensory benefits are maximized under high stimulus-driven uncertainty.
- Enhanced informational content in multisensory stimulation facilitates robust temporal regularity extraction, boosting sensory representations.
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