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Updated: Mar 9, 2026

Brain Imaging Investigation of the Impairing Effect of Emotion on Cognition
Published on: February 1, 2012
Cognitive Load Mediates the Effect of Emotion on Analytical Thinking
Bastien Trémolière1, Marie-Ève Gagnon1, Isabelle Blanchette1
11 Département de Psychologie, Université du Québec à Trois-Rivières, QC, Canada.
Emotion impairs reasoning by increasing cognitive load. This study shows that emotional content demands more mental resources, hindering problem-solving performance and confirming the cognitive load hypothesis.
Area of Science:
- Cognitive Psychology
- Neuroscience
Background:
- The negative impact of emotion on reasoning is well-documented.
- However, the precise cognitive mechanisms remain largely unexplored.
Purpose of the Study:
- To investigate the cognitive load hypothesis as an explanation for emotion's detrimental effect on reasoning.
- To explore how emotional content influences cognitive resource allocation during syllogistic reasoning.
Main Methods:
- Participants solved syllogistic reasoning problems with neutral or emotional content.
- A secondary task, varying in difficulty, assessed cognitive resource availability.
- Performance on both primary reasoning and secondary tasks was measured.
Main Results:
- Participants performed worse and took longer on emotional reasoning problems compared to neutral ones.
- Performance on the difficult secondary task was impaired when processing emotional content, indicating higher cognitive resource demand.
- These findings support the role of cognitive load in mediating emotion's effect on reasoning.
Conclusions:
- The study provides evidence that increased cognitive load is the mechanism through which emotion impairs reasoning.
- Processing emotional content requires significant cognitive resources, detracting from reasoning abilities.
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