Two Aspects of Activation: Arousal and Subjective Significance - Behavioral and Event-Related Potential Correlates Investigated by Means of a Modified Emotional Stroop Task

Overview

Journal Front Hum Neurosci

Specialty Neurology

Date 2018 Jan 10

PMID 29311872

Citations 13

Authors

Kamil Imbir

Tomasz Spustek

Gabriela Bernatowicz

Joanna Duda

Jaroslaw Zygierewicz

Affiliations

Soon will be listed here.

Abstract

The arousal level of words presented in a Stroop task was found to affect their interference on the required naming of the words' color. Based on a dual-processes approach, we propose that there are two aspects to activation: arousal and subjective significance. Arousal is crucial for automatic processing. Subjective significance is specific to controlled processing. Based on this conceptual model, we predicted that arousal would enhance interference in a Stroop task, as attention would be allocated to the meaning of the inhibited word. High subjective significance should have the opposite effect, i.e., it should enhance the controlled and explicit part of Stroop task processing, which is color naming. We found that response latencies were modulated by the interaction between the arousal and subjective significance levels of words. The longest reaction times were observed for highly arousing words of medium subjective significance level. Arousal shaped event related potentials in the 150-290 ms time range, while effects of subjective significance were found for 50-150, 150-290, and 290-530 ms time ranges.

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