- In this study, the researchers investigated the acute impacts of a 60 mg dose of caffeine on sustained attention in tests lasting up to 45 minutes using 82 low or non-caffeine-consuming healthy male (n=41) and female (n=41) adults aged somewhere around 40 and 60 years.
- Vigilance was measured utilizing Mackworth Clock test, Rapid Visual Information Processing Test, adaptive tracking test, saccadic eye movement and attention switch test.
- Impacts on mood and fatigue were analysed utilizing Bond and Lader and Caffeine Research visual analogue scales, and Samn–Perelli questionnaire.
- Saliva sampling was performed for both compliance and caffeine pharmacokinetic analysis.
- Researchers found that administration of a 60 mg caffeine dose brought about a significant improvement in sustained attention compared with the placebo.
- Additionally a significantly improved peak saccadic velocity and reaction time performance was found, and diminished error rate.
- Significantly expanded feelings of alertness, contentment and overall mood after caffeine treatment compared with placebo were watched.