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Investigating the Deployment of Visual Attention Before Accurate and Averaging Saccades via Eye Tracking and Assessment of Visual Sensitivity

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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.

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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.