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This profile was last updated on 12/16/12  and contains information from public web pages and contributions from the ZoomInfo community.

Dr. Harris R. Lieberman

Wrong Dr. Harris R. Lieberman?

Research Psychologist

Local Address: Natick, Massachusetts, United States
U.S. Army Research Institute of Environmental Medicine

Employment History

  • Position, Military Nutrition Division
    U.S. Army Research Institute of Environmental Medicine
  • Psychologist and Caffeine Investigator
    U.S. Army Research Institute of Environmental Medicine
  • Member, Military Nutrition Division
  • Research Psychologist
    U.S. Army
  • Leading Caffeine Researcher
    U.S. Army
  • Psychologist
    Army Research Institute of Environmental Medicine


  • Ph.D.
104 Total References
Web References
Harris Lieberman, study ..., 16 Dec 2012 [cached]
Harris Lieberman, study co-author and research psychologist with the Military Nutrition Division of the U.S. Army Research Institute in Natick, explained that "Even mild dehydration that can occur during the course of our ordinary daily activities can degrade how we are feeling, especially for women, who appear to be more susceptible to the adverse effects of low levels of dehydration than men.
Besides boosting brainpower and memory, ..., 1 Dec 2012 [cached]
Besides boosting brainpower and memory, caffeine makes you feel more vigorous and improves mood, says Harris R. Lieberman, Ph.D., a research psychologist with the US Army Research Institute of Environmental Medicine in Natick, Massachusetts.
Go with it and go to bed. "Even just a single night of disrupted sleep or a few hours of chronic sleep loss each night can influence how vigorous and alert you feel the next day," Dr. Lieberman says. Aim for seven to nine hours of solid shut-eye each night. The Energizer bunny runs on batteries.
Reflections In A Cup: New Coffee Slogan? - Canadian Vending & Office Coffee Service Magazine, 6 Oct 2008 [cached]
"Caffeine's boosting your brainpower has been proven beyond any reasonable doubt. 'As a research psychologist,' says Harris Lieberman, who works in the Military Nutrition Division of the U.S. Army Research Institute of Environmental Medicine in Natick, Mass., 'I use the word intelligence as an inherent trait, something permanently part of your makeup.' Caffeine can't change that, Lieberman says.
"Coffee improves alertness and reaction ..., 30 June 2009 [cached]
"Coffee improves alertness and reaction time in people, whether they're habitual consumers of coffee or not," says Harris Lieberman, a psychologist and caffeine investigator at the US Army Research Institute of Environmental Medicine.
But "the effect is clearly limited to the ability to maintain attention," he adds. "Things like memory or complex reasoning won't improve."
In the sleep-deprived, however, caffeine has a more striking impact. "It improves almost everything you can measure," says Lieberman. "It makes you more alert, it seems like you can perform complex tasks better, and your memory is better. Why?
"People who are falling asleep on the job can't do much of anything," says Lieberman.
"There's no question that caffeine will improve aerobic physical endurance in non-athletes as well," says Lieberman, adding that people who run, jog, swim, or cycle can last longer if they've had 200 to 600 mg. of caffeine beforehand. "And new research suggests that caffeine can also improve anaerobic performance," he adds.
Caffeine: Friend or Foe?, 11 June 2009 [cached]
Still, Harris R. Lieberman, Ph.D., of the Military Nutrition Division of the USARIEM in Natick, Mass., recommends avoiding caffeine too late in the evening.
According to Lieberman, "There is good evidence that caffeine will improve your athletic performance.
"The source doesn't matter," says Lieberman.
Dr. Lieberman studied Navy Seals during their "hell week" training and found that caffeine, versus a placebo, resulted in significant differences in performance on cognitive tests. His conclusion was that caffeine increases alertness and mental acuity in those under stressful conditions, particularly sleep deprivation.
"The effect caffeine will have depends on whether you're rested or sleep-deprived," says Lieberman.
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