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Updated: Jun 15, 2026

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Objectively Assessing Sports Concussion Utilizing Visual Evoked Potentials
Published on: April 27, 2021
Reduced processing speed in rugby union players reporting three or more previous concussions.
Andrew Gardner1, E Arthur Shores, Jennifer Batchelor
1Department of Psychology, Macquarie University, New South Wales, Australia.
Summary
Multiple concussions may negatively impact cognitive function in athletes. Rugby players with a history of three or more sports-related concussions showed lower processing speed compared to uninjured peers.
Area of Science:
- Sports Medicine
- Neuroscience
- Cognitive Psychology
Background:
- The impact of multiple sports-related concussions on cognitive function remains controversial.
- Conflicting findings exist, potentially due to differences in neuropsychological testing methods.
- Previous research shows varied results, with some studies indicating detrimental effects and others finding none.
Purpose of the Study:
- To investigate the cognitive effects of multiple concussions in adult male rugby union players.
- To compare cognitive function between athletes with a history of three or more concussions and those with no concussion history.
Main Methods:
- Employed a sample of 73 adult male rugby union players (34 with multiple concussions, 39 with no concussions).
- Utilized a computerized neuropsychological battery and a traditional processing speed test.
- Compared processing speed measures between the two groups.
Main Results:
- Athletes with a history of three or more concussions performed significantly lower on two processing speed measures.
- This deficit was observed across both computerized and traditional testing formats.
- Findings suggest a detrimental effect on cognitive function associated with multiple concussions.
Conclusions:
- A history of three or more self-reported concussions may negatively impact cognitive function in active athletes.
- Results contribute to resolving conflicting literature by demonstrating effects across different testing methods.
- Future research should explore moderating factors to identify at-risk athletes and explain discrepancies.

