Trouble is Brewing: Exploring the Relationship Between Time of Coffee Consumption and Short-Term Memory Performance


  • Rayanna Shwom Half Hollow Hills
  • Alycia Breig



Coffee, Caffiene, Memory


Many high school students drink coffee either in the morning before a test to feel more awake or the night before a test so they can stay up later to study. However, it is unclear if it is more beneficial to a student’s memory, and therefore test performance, to drink coffee at night or in the morning. A case study experiment was performed in which six participants underwent two trials. In each trial, participants consumed coffee at varying times before taking a short-term memory test the following morning. Based on these test scores, the time at which coffee had the most beneficial effect on memory test performance was determined for each participant. It was found that the time of day that caffeine is consumed affects each high school student’s short-term memories differently based on personal factors, such as caffeine sensitivity. Although limited, these findings add to the field of research and have practical implications in terms of test performance for high school students.


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References or Bibliography

Anderson, M., Petros, T., Beckwith, B., Mitchell, W., & Fritz, S. (1991). Individual Differences in the Effect of Time of Day on Long-Term Memory Access. The American Journal of Psychology, 104(2), 241-255. doi:10.2307/1423157

Caffeine & Sleep Problems. (n.d.). Retrieved from

Current Coffee Consumer Trends: Inside the NCA's 2018 Report. (2018, October 3). Retrieved from

DeRupo, J. (2017, March 25). “Daily Coffee Consumption Up Sharply: Strength among Younger Consumers and Gourmet Varieties Drive Increase.” Retrieved from

Domanico, A. (2014, September 2). This is what caffeine does to your brain. Retrieved from

Hernandez, M. (2019, October 15). Is Coffee an Addiction? Retrieved from|A602774003&searchId=R6&tabID=T004&linkSource=termClusters&inPS=true.

Kennedy, B. K., Lawler, M., Bedosky, L., Migala, J., & Millard, E. (n.d.). 6 Reasons You're Sensitive to Caffeine (and What to Have Instead): Everyday Health. Retrieved from

Kelly, K. (2018, July 6). Why Caffeine Affects Some People More Than Others. Retrieved from

Langer, J. W. (2018, June). Genetics, metabolism and individual responses to caffeine. Retrieved from

Morin, A. (2020, February 3). Learn If You Should You Let Your Teenager Drink Caffeinated Drinks. Retrieved from

Morris, S. (2014, June 9). Caffeine Has Positive Effect on Memory: Johns Hopkins Medicine. Retrieved from

(n.d.). Retrieved from

Potkin, K. T., & Bunney, W. E. (2012). Sleep improves memory: the effect of sleep on long term memory in early adolescence. Retrieved from

Sherman, M., S., Buckley, P., T., Baena, Elsa, … Lee. (2016, October 26). Caffeine Enhances Memory Performance in Young Adults during Their Non-optimal Time of Day. Retrieved from

Sifferlin, A. (2014, June 16). Boys and Girls Are Impacted By Caffeine Differently. Retrieved from

Villazon, L. (n.d.). How long does caffeine take to kick in? Retrieved from

What you should know about ... caffeine. (1991, April 1). Retrieved from|A16151398&searchId=R4&tabID=T001&linkSource=termClusters&inPS=true.



How to Cite

Shwom, R., & Breig, A. (2020). Trouble is Brewing: Exploring the Relationship Between Time of Coffee Consumption and Short-Term Memory Performance. Journal of Student Research, 9(2).



AP Research Articles