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Neuro-Behavioral Correlates of Post-Deviance Distraction in Middle-Aged and Old Adults
Ist Teil von
Journal of psychophysiology, 2014-01, Vol.28 (3), p.178-186
Ort / Verlag
Hogrefe Publishing
Erscheinungsjahr
2014
Link zum Volltext
Quelle
PsycARTICLES
Beschreibungen/Notizen
The presentation of a task-irrelevant deviant (novel) stimulus among otherwise
repeated standard stimuli usually reduces performance not only for the deviant
stimulus, but also for the standard following that deviant. Here, the so-called
post-deviance distraction was investigated in 58 middle-aged and 52 old adults,
using an auditory duration discrimination task and event-related potential (ERP)
measures. After a deviant stimulus, the participants showed a decrease in
performance in the subsequent standard stimulus. This effect was more pronounced
in the old, than middle-aged, group. Relative to the standard stimuli preceding
the deviant, post-deviant standards triggered a chain of mismatch negativity
(MMN), P3a, and reorienting negativity (RON). While MMN and P3a did not differ
in old and middle-aged adults, older participants showed a delayed RON. Assuming
the RON to reflect processes of general task or feature reconfiguration and
updating, these results suggest a delay in orienting-reorienting mechanisms as
possible source of increased post-deviance distraction in elderly.