The p300 as a marker of waning attention and error propensity.

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Datta, Avijit 
Cusack, Rhodri 
Hawkins, Kari 
Heutink, Joost 
Rorden, Chris 

Action errors can occur when routine responses are triggered inappropriately by familiar cues. Here, EEG was recorded as volunteers performed a "go/no-go" task of long duration that occasionally and unexpectedly required them to withhold a frequent, routine response. EEG components locked to the onset of relevant go trials were sorted according to whether participants erroneously responded to immediately subsequent no-go trials or correctly withheld their responses. Errors were associated with a significant relative reduction in the amplitude of the preceding P300, that is, a judgement could be made bout whether a response-inhibition error was likely before it had actually occurred. Furthermore, fluctuations in P300 amplitude across the task formed a reliable associate of individual error propensity, supporting its use as a marker of sustained control over action.

1701 Psychology, Clinical, Clinical Medicine and Science, Behavioral and Social Science
Journal Title
Comput Intell Neurosci
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Hindawi Limited
Medical Research Council (MC_U105559837)