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Related Experiment Video

Updated: May 26, 2026

Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition

Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition

Published on: February 1, 2012

Emotional distraction unbalances visual processing.

Rashmi Gupta¹, Jane E Raymond

¹School of Psychology, Bangor University, Brigantia Building, Penrallt Road, Bangor, Gwynedd LL57 2AS, UK.

Psychonomic Bulletin & Review

|January 10, 2012

Summary

This summary is machine-generated.

Emotional stimuli temporarily impair cognitive tasks, particularly in the left visual field. This suggests a right-lateralized brain mechanism for emotional responses competes with nonemotional cognitive processes.

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Area of Science:

Cognitive Neuroscience
Neuroscience of Emotion

Background:

Cognitive control mechanisms for nonemotional tasks may differ from those processing emotional stimuli.
Emotional stimuli can interfere with nonemotional cognitive functions.
Prior research indicates right-lateralized frontal brain activation during emotional suppression.

Purpose of the Study:

To investigate if emotional stimuli cause lateralized performance costs on nonemotional cognitive tasks.
To determine if emotional stimuli engage a right-lateralized brain response mechanism.

Main Methods:

Participants performed a letter search task after a brief presentation of emotional (angry, happy, sad, fearful) or neutral faces.
Stimulus presentation was time-locked to visual search task onset.
Response times for target detection in left and right visual hemifields were measured.

Main Results:

Emotional faces, compared to neutral faces, significantly slowed visual search performance for targets in the left hemifield.
No significant effect was observed for targets in the right hemifield.
Neutral, scrambled, or inverted faces did not produce lateralized effects on search times.

Conclusions:

Emotional stimuli engage a right-lateralized neural mechanism that interferes with nonemotional cognitive processing.
This interference manifests as a performance cost, particularly for tasks in the contralateral (left) visual field.
Findings support a model where emotional response systems compete with cognitive control networks.