Effects of low doses of caffeine on cognitive performance, mood and thirst in low and higher caffeine consumers

@article{Smit2000EffectsOL,
  title={Effects of low doses of caffeine on cognitive performance, mood and thirst in low and higher caffeine consumers},
  author={Hendrik Jan Smit and Peter J. Rogers},
  journal={Psychopharmacology},
  year={2000},
  volume={152},
  pages={167-173}
}
Abstract. Rationale: Caffeine is present in many widely consumed drinks and some foods. In the fairly extensive literature on the psychostimulant effects of caffeine, there are few dose-response studies and even fewer studies of the effects of doses of caffeine lower than 50 mg (the range of the amounts of caffeine contained in, for example, a typical serving of tea or cola). Objective: This study measured the effects of 0, 12.5, 25, 50 and 100 mg caffeine on cognitive performance, mood and… 
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Cognitive and mood improvements of caffeine in habitual consumers and habitual non-consumers of caffeine
TLDR
The present placebo-controlled, double-blind, balanced crossover study investigated the acute cognitive and mood effects of caffeine in habitual users and habitual non-users of caffeine and found that caffeine tended to benefit consumers’ mood more while improving performance more in the non-consumers.
Psychostimulant and other effects of caffeine in 9- to 11-year-old children.
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The results suggest that, like adults, children probably derive little or no benefit from habitual caffeine intake, although negative symptoms associated with overnight caffeine withdrawal are avoided or rapidly reversed by subsequent caffeine consumption.
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