Effects of caffeine on simple reaction time and movement time.
There were 19 males and 11 females with a mean age of 21 +/- 3 years and a mean weight of 72.8 +/- 3.2 kg who participated in an experiment to investigate the effect of caffeine on simple reaction time (RT) and movement time (MT). Subjects were randomly assigned to one of three groups--two experimental groups and one control group. Caffeine was administered using a double-blind format: Group 1, 600 mg caffeine; Group 2, 300 mg caffeine. Group 3, the control group, was given a placebo. All subjects were pre-tested for RT and MT prior to consumption of one of the three solutions. Post-test was conducted subsequent to an absorption period of 45 min. Results indicated a significant effect (p less than 0.05) between pre- and post-test measurements for both RT and MT favoring the 300 mg group. However, no significant effect (p greater than 0.05) was found between pre- and post-test measurements for RT or MT in the 600-mg group.
Oklahoma State University, Stillwater 74078-0616.
B H
BH
Jacobson
B M
BM
Edgley
D000328:Adult; D002110:Caffeine / Q000008:administration & dosage / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D008297:Male; D009068:Movement / Q000187:drug effects*; D011930:Reaction Time / Q000187:drug effects*
D002110:Caffeine