I think I can, I think I can...

So here I am, flogging the Computrainer, when I discover that all I need to do it think that I'm faster...I love this study:

Method: Six well-trained male cyclists undertook two baseline and three experimental 10-km time trials. Subjects were informed that in the experimental trials they would each receive a placebo, 4.5 mg[middle dot]kg-1 caffeine, and 9.0 mg[middle dot]kg-1 caffeine, randomly assigned. However, placebos were administered in all experimental conditions. Semistructured interviews were also conducted to explore subjects' experience of the effects of the capsules before and after revealing the deception.

Results: A likely trivial increase in mean power of 1.0% over baseline was associated with experimental trials (95% confidence limits, -1.4 to 3.6%), rising to a likely beneficial 2.2% increase in power associated with experimental trials in which subjects believed they had ingested caffeine (-0.8 to 5.4%). A dose-response relationship was evident in experimental trials, with subjects producing 1.4% less power than at baseline when they believed they had ingested a placebo (-4.6 to 1.9%), 1.3% more power than at baseline when they believed they had ingested 4.5 mg[middle dot]kg-1 caffeine (-1.4 to 4.1%), and 3.1% more power than at baseline when they believed they had ingested 9.0 mg[middle dot]kg-1 caffeine (-0.4 to 6.7%). All subjects reported caffeine-related symptoms.

(Here is where this came from, BTW):

APPLIED SCIENCES

Medicine & Science in Sports & Exercise. 38(12):2159-2164, December 2006.
BEEDIE, CHRISTOPHER J.; STUART, ELIZABETH M.; COLEMAN, DAMIAN A.; FOAD, ABIGAIL J.