meta_analysis
    2020
    High Quality

    Effects of caffeine on reaction time and psychomotor vigilance: a systematic review and meta-analysis

    Irwin C, Khalesi S, Desbrow B, McCartney D

    Published in European Journal of Nutrition

    Methodology

    Meta-analysis of randomised placebo-controlled trials of caffeine on simple and choice reaction time in healthy adults.

    Key Findings

    Caffeine significantly reduced simple and choice reaction time relative to placebo, with the largest gains in fatigued participants.

    Conclusions

    Caffeine reliably improves reaction time.

    Limitations

    Withdrawal reversal in habitual users may inflate effects.

    Outcomes Measured

    Reaction Time Improvement
    Primary

    Caffeine significantly reduced simple and choice reaction time relative to placebo, with the largest gains in fatigued participants

    Study Details

    Year:2020
    Duration:1 weeks
    Quality Score:8/10

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