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Value-driven Crossmodal Attention

Subject Area General, Cognitive and Mathematical Psychology
Term from 2019 to 2023
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 411721317
 
Final Report Year 2024

Final Report Abstract

This collaborative research project investigated the dynamics of value-based attention across various dimensions: its ability to transfer between sensory modalities, the processing stages it affects, its impact on search performance when value-based association is on irrelevant stimuli, the interplay with individual preferences, and its interaction with the brain's attention networks. Investigations revealed that value-driven attention spans across sensory modalities. Studies using visual-tactile search tasks found that value-based attention predominantly influences the later stages of target identification. This finding was supported by experiments that differentiated between the search and identification stages within each modality. The research also explored how reward associations could be formed at different levels—feature, response, and task-set—with evidence suggesting that both feature-based and task-set-based associations are viable, given continuity in task-set between training and testing phases. Studies also highlighted the relationship between reward association and individual color-valence preferences, particularly with the commonly used red and green stimuli. Results indicated that individual preferences for certain color-valence combinations tend to enhance search performance, even when the preferred color appears as a distractor. This suggests an overarching facilitation effect, likely mediated by the general alerting system of the brain, which enhances both attention selection and target processing mechanisms. Further neuroimaging studies utilizing EEG and fMRI techniques further underscored these findings, showing that high-reward targets necessitate greater inhibitory control to counteract increased automatic responses. This inhibition involves critical areas of the brain, including the motor cortex, medial frontal cortex, and the frontobasal ganglia network. Together, these findings provide a comprehensive view of how value-based attention operates across sensory modalities and processing stages, its behavioral implications, and the underlying neural mechanisms.

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