Christina Reimer - "On the interplay of visual and central attention" 29.01.2019
29.01.2019 (Di) 17:15 Uhr, Raum 4046, VMP 5
Abstract
Visual and central attention are limited in capacity. In conjunction search, visual attention is required to select items and to bind item features, which results in a serial search process. In dual-tasks, central attention is required to bind perceived stimulus to associated response information in Task 1 and Task 2, respectively, which results in sequential response selection performance. Here, I investigated whether conjunction search and response selection are processed sequentially, indicating that visual and central attention share a capacity limitation, or whether conjunction search and response selection are processed concurrently, indicating that visual and central attention rely on distinct capacity limitations. The behavioral results based on the locus-of-slack method and the electrophysiological results of the N2pc (N2 posterior contralateral, an event-related potential indexing visuo-spatial attention deployment) showed that conjunction search and response selection were processed concurrently, when visual attention demands were low. However, when visual attention demands were high, conjunction search and response selection were processed sequentially. To conclude, visual attention demands modulate the interplay of visual and central attention.