Caffeine and Short-term memory is debated

Posted by jrbecker on December 1, 2005, at 10:15:01

A recent study touts caffeine's boost on short-term memory.

http://www.medpagetoday.com/Pediatrics/DietNutrition/tb/2238

However, there have also been assertions to the contrary...

http://news.bbc.co.uk/2/hi/health/3909085.stm

Also, this is an interesting study that shows that the benefits of caffeine are actually just in relation to relieving its withdrawal effects...

Psychopharmacology (2005) 182: 1–8
Jack E. James . Peter J. Rogers
Effects of caffeine on performance and mood: withdrawal reversal is the most plausible explanation

Abstract Rationale: Although it is widely believed that caffeine can enhance human performance and mood, the validity of this belief has been questioned, giving rise to debate. The central question is whether superior performance and mood after caffeine represent net benefits, or whether differences between caffeine and control conditions are due to reversal of adverse withdrawal effects. Objectives: To provide a focussed review of relevant experimental studies with the aim of clarifying current understanding regarding the effects of caffeine on human performance and mood. Methods: To avoid the shortcomings of standard placebo-controlled studies, which are ambiguous due to failure to control for the confounding influence of withdrawal reversal, three main experimental approaches have been employed: studies that compare consumers and low/non-consumers, pre-treatment and ad lib consumption studies, and long-term withdrawal studies. Results: Of the three approaches, only long-term withdrawal studies are capable of unambiguously revealing the net effects of caffeine. Overall, there is little evidence of caffeine having beneficial effects on performance or mood under conditions of long-term caffeine use vs abstinence. Although modest acute effects may occur following initial use, tolerance to these effects appears to develop in the context of habitual use of the drug. Conclusions: Appropriately controlled studies show that the effects of caffeine on performance and mood, widely perceived to be net beneficial
psychostimulant effects, are almost wholly attributable to reversal of adverse withdrawal effects associated with short periods of abstinence from the drug.

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• Caffeine and Short-term memory is debated jrbecker 12/1/05

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