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Date of Graduation

Summer 5-7-2010

Document Type


Degree Name

Master of Arts (MA)


Department of Graduate Psychology


A behavioral form of impulsivity, delay discounting, has been used to examine the effects of drug consumption on individuals' abilities to delay gratification. However, delay discounting has not been used to examine one of the most commonly used drugs in the world, caffeine. Nor has delay discounting been used to examine the effects of drug influence on impulsivity. This study examined the influence of 200 mg caffeine on delay discounting in a collegiate sample. 15 participants underwent two experimental sessions: a caffeine condition and a placebo condition. Although participants were more impulsive under caffeine than under placebo, this trend was non-significant. This study does however provide a good model for evaluating the influence of drug state on impulsivity.

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