The relationships between daily caffeine consumption and both habitual sleep duration and sleep satisfaction were assessed using the responses of 170 students. Essentially, our data replicated an earlier study, in that we found an inverse relationship between level of daily consumption of caffeinated drinks and habitual sleep duration and a nonsignificant relationship between caffeine use and sleep satisfaction.
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In part, this research was supported by NIH Grant RR 08192-03 and NIMH Grant MH 17057-01.
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Hicks, R.A., Hicks, G.J., Reyes, J.R. et al. Daily caffeine use and the sleep of college students. Bull. Psychon. Soc. 21, 24–25 (1983). https://doi.org/10.3758/BF03329943