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Age-related changes in cognitive conflict processing: an event-related potential study.

Ralph Mager·Alex H Bullinger·Serge Brand·Maria Schmidlin·Heinz Schärli·Franz Müller-Spahn·Robert Störmer·Michael Falkenstein
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Abstract

Cognitive tasks involving conflicting stimuli and responses are associated with an early age-related decline in performance. Conflict and conflict-induced interference can be stimulus- or response-related. In classical stimulus-response compatibility tasks, such as the Stroop task, the event-related potential (ERP) usually reveals a greater negativity on incongruent versus congruent trials which has often been linked with conflict processing. However, it is unclear whether this negativity is related to stimulus- or response-related conflict, thus rendering the meaning of age-related changes inconclusive. In the present study, a modified Stroop task was used to focus on stimulus-related interference processes while excluding response-related interference. Since we intended to study work-relevant effects ERPs and performance were determined in young (about 30 years old) and middle-aged (about 50 years old) healthy subjects (total n=80). In the ERP, a broad negativity developed after incongruent versus congruent stimuli between 350 and 650 ms. An age-related increase of the latency and amplitude of this negativity was observed. These results indicate age-related alterations in the processing of conflicting stimuli already in middle age.

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AdultAgingBrainCognitionConflict, PsychologicalDecision MakingEvoked PotentialsFemaleHumansMaleMiddle AgedTask Performance and AnalysisJournal ArticleResearch Support, Non-U.S. Gov't

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Ralph Mager, Alex H Bullinger, Serge Brand, Maria Schmidlin, Heinz Schärli, Franz Müller-Spahn, Robert Störmer, Michael Falkenstein. 2006-09-14. Age-related changes in cognitive conflict processing: an event-related potential study.. https://doi.org/10.1016/j.neurobiolaging.2006.08.001

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