TY  - JOUR
PY  - 2017//
TI  - Shifting attention between visual dimensions as a source of switch costs
JO  - Psychological science
A1  - Elchlepp, Heike
A1  - Best, Maisy
A1  - Lavric, Aureliu
A1  - Monsell, Stephen
SP  - 470
EP  - 481
VL  - 28
IS  - 4
N2  - Task-switching experiments have documented a puzzling phenomenon: Advance warning of the switch reduces but does not eliminate the switch cost. Theoretical accounts have posited that the residual switch cost arises when one selects the relevant stimulus-response mapping, leaving earlier perceptual processes unaffected. We put this assumption to the test by seeking electrophysiological markers of encoding a perceptual dimension. Participants categorized a colored letter as a vowel or consonant or its color as "warm" or "cold." Orthogonally to the color manipulation, some colors were eight times more frequent than others, and the letters were in upper- or lowercase. Color frequency modulated the electroencephalogram amplitude at around 150 ms when participants repeated the color-classification task. When participants switched from the letter task to the color task, this effect was significantly delayed. Thus, even when prepared for, a task switch delays or prolongs encoding of the relevant perceptual dimension.<p />  <p>Language: en</p>
LA  - en
SN  - 0956-7976
UR  - http://dx.doi.org/10.1177/0956797616686855
ID  - ref1
ER  -