Sleep Loss and Temporal Memory Yvonne Harrison and James A. Horne Sleep Research Laboratory, Loughborough University, Leicestershire, U.K. By: Neha Kakkar. Introduction.
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By: Neha Kakkar
In 1977, Wilkinson suggested that boredom may be the key to a test’s sensitivity to sleep deprivation.
Caffeine is not known to improve performance in alert, non-sleep deprived subjects undergoing short-duration tests.
350mg Anhydrous caffeine dissolved in 200ml decaffeinated coffee given in a divided dose
Placebo: decaffeinated coffee only
List A: 12 faces
List B: 12 faces
After both sets, another presentation of random 48 faces including 24 previously presented faces.
- For each one, asked whether they had seen the photo before (recognition) and also if it was part of List A or B (recency)
Significant Main effect of sleep condition
Significant interaction (sleep condition x caffeine interaction) F(1,36) = 4.26, p<.05
No main effect of caffeine F(1,36) = 0.74
Significant main effect for accuracy F(1,72)=16.7,p<.005
All groups were more confident about being correct when judging responses that were right
Significant effect for sleep condition , F(1,72)=13.63, p<.005
Sleep deprived participants were more confident than control about being correct for both right and wrong responses.
Sleep deprived individuals were significantly more confident when they were wrong.
Temporal memory component of this faces test seems to rely on the integrity of the PFC (Daum et. al, 1996)
Patients with damaged PFC are impaired at the recency aspect of the task rather than with the recognition component (Daum et. al, 1996).