Expectation of having consumed caffeine can improve performance and mood
Dawkins, L., Shahzad, Fatima-Zahra, Ahmed, Suada S. and Edmonds, C. 2011. Expectation of having consumed caffeine can improve performance and mood. Appetite. 57 (3), pp. 597-600.
|Authors||Dawkins, L., Shahzad, Fatima-Zahra, Ahmed, Suada S. and Edmonds, C.|
We explored whether caffeine, and expectation of having consumed caffeine, affects attention, reward responsivity and mood using double-blinded methodology. 88 participants were randomly allocated to ‘drink-type’ (caffeinated/decaffeinated coffee) and ‘expectancy’ (told caffeinated/told decaffeinated coffee) manipulations. Both caffeine and expectation of having consumed caffeine improved attention and psychomotor speed. Expectation enhanced self-reported vigour and reward responsivity. Self-reported depression increased at post-drink for all participants, but less in those receiving or expecting caffeine. These results suggest caffeine expectation can affect mood and performance but do not support a synergistic effect.
|Keywords||caffeine; mood; expectancy; performance|
|Journal citation||57 (3), pp. 597-600|
|Accepted author manuscript|
|Web address (URL)||http://hdl.handle.net/10552/1347|
|29 Jul 2011|
|Publication process dates|
|Deposited||18 Nov 2011|
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