Premium
Electrophysiological correlates of anticipatory task‐switching processes
Author(s) -
Nicholson Rebecca,
Karayanidis Frini,
Poboka Dane,
Heathcote Andrew,
Michie Patricia T.
Publication year - 2005
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.2005.00350.x
Subject(s) - task switching , stimulus (psychology) , psychology , cued speech , control reconfiguration , negativity effect , cognitive psychology , audiology , communication , neuroscience , cognition , computer science , medicine , embedded system
Recent studies show a differential switch‐related positivity emerging before a switch trial and reflecting anticipatory task‐set reconfiguration processes. In this study, the switch‐related positivity was examined in a cued task‐switching paradigm. Cue‐stimulus and response‐stimulus intervals were independently manipulated to dissociate between the effects of anticipatory preparation and passive dissipation of task‐set interference. Reaction time switch cost declined with increasing cue‐stimulus and response‐stimulus intervals, suggesting a contribution from both active preparation and passive interference processes. In cue‐related difference waveforms, a switch positivity peaked around 350–400 ms and is interpreted as reflecting differential activation of task‐set reconfiguration. In stimulus‐related difference waveforms, a switch‐related negativity is believed to indicate the role of S‐R priming and response interference in task‐switching.