Journal article
Caffeine enhances working memory for extraverts
LD Smillie, E Gökçen
Biological Psychology | ELSEVIER SCIENCE BV | Published : 2010
Abstract
Using a randomized double-blind placebo-controlled design we examined the effects of caffeine on working memory (WM) as a function of extraverted personality. Participants (N=59) received 200. mg of caffeine and placebo in counterbalanced-order over two sessions prior to completing a '. N-Back' WM paradigm. Findings revealed that caffeine administration relative to the placebo condition resulted in heightened WM performance, but only for extraverted participants. We suggest based on previous theory and research that dopamine function (DA) may be the most plausible mechanism underlying this finding. © 2010.
Grants
Awarded by British Academy
Funding Acknowledgements
We would like to thank Tank Ali and Fiona Murray for their assistance with data collection.Funding: The first author would like to acknowledge financial support from the British Academy (PDF/2006/291).