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Related Experiment Video

Updated: Jul 15, 2026

Errors as a Means of Reducing Impulsive Food Choice

Errors as a Means of Reducing Impulsive Food Choice

Published on: June 5, 2016

Does the error negativity reflect response conflict strength? Evidence from a Simon task.

Hiroaki Masaki¹, Michael Falkenstein, Birgit Stürmer

¹Faculty of Sport Sciences, Waseda University, Saitama, Japan. masaki@waseda.jp

Psychophysiology

|April 18, 2007

Summary

The error-related negativity (ERN) did not reflect response conflict levels in a Simon task. Study findings challenge the hypothesis that ERN amplitude mirrors the degree of conflict during response selection.

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Area of Science:

Cognitive Neuroscience
Electrophysiology
Human Psychology

Background:

The error-related negativity (ERN) is an electrophysiological signal linked to error detection and response conflict.
Previous research suggests ERN amplitude correlates with the degree of conflict between response alternatives.

Purpose of the Study:

To investigate whether the ERN amplitude reflects the degree of response conflict.
To examine the relationship between task difficulty, response conflict, and ERN amplitude in a Simon task.

Main Methods:

Participants performed a Simon task with varying difficulty levels to manipulate response conflict.
Electromyography (EMG) was used to quantify conflict in error trials.
ERN amplitudes were measured and compared across different difficulty conditions.

Main Results:

The amount of conflict, measured by EMG, was significantly higher in the easy condition compared to the hard condition.
However, ERN amplitudes did not differ between the easy and hard difficulty conditions.
No correlation was found between the measured conflict and ERN amplitude.

Conclusions:

The study's findings do not support the hypothesis that the ERN reflects the degree of response conflict.
Alternative explanations for the ERN's function, beyond response conflict, may need to be considered.
The ERN might be more related to detecting incorrect responses than to the conflict preceding them.