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Which factors are important for crossmodal attentional effect?
L L Righi1, L E Ribeiro-do-Valle
1Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, 05508-000, Brazil. lurighi@icb.usp.br
Experimental Brain Research
|February 2, 2013
Summary
Crossmodal attention effects depend on stimulus timing and task demands. A longer stimulus onset asynchrony (SOA) and location discrimination tasks facilitate crossmodal attentional effects.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Perception
Background:
- Crossmodal attention is influenced by experimental parameters.
- Previous research indicates sensitivity to protocol features.
Purpose of the Study:
- Investigate the impact of stimulus onset asynchrony (SOA) on crossmodal attention.
- Examine how different tasks affect crossmodal attentional effects.
Main Methods:
- Two experiments were conducted using auditory cues and visual targets (Gabor patches).
- Experiment 1 varied SOA (133 ms vs. 159 ms) and target location, requiring spatial frequency discrimination.
- Experiment 2 used a 133 ms SOA and required target location discrimination.
Main Results:
- Crossmodal attentional effects were observed only at the 159 ms SOA in Experiment 1.
- A crossmodal attentional effect was found at the 133 ms SOA when participants discriminated target location in Experiment 2.
- These findings suggest SOA and task type modulate crossmodal attention.
Conclusions:
- Crossmodal attentional effects are dependent on both the stimulus onset asynchrony (SOA) and the nature of the task.
- Spatial frequency discrimination requires a longer development time for crossmodal attention compared to location discrimination.
