01/03/2025
This study has certain limitations. The number of participants in some subgroups, especially the low-caffeine fast metabolisers, was quite small, which could affect the reliability of some findings. Also, while the study considered several factors that could influence cognitive performance, there might be other unmeasured factors at play. The cognitive tests were conducted at home, which is more representative of real-life situations but less controlled than a laboratory setting. The order in which the cognitive tests were administered might also have influenced the results, particularly for the emotion recognition task, which was always presented first.
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Slow caffeine metabolizers excel in emotion recognition with high caffeine intake, while fast metabolizers perform better in executive function tasks with moderate caffeine consumption.
