Table 1.

Pre-, post- and difference scores on arousal in all conditions (n = 20, mean ± SEM)

	Control	Placebo	Caffeine	Active placebo
Pre	5.1 ± 0.4	4.8 ± 0.4	4.6 ± 0.4	4.5 ± 0.4
Post	4.1 ± 0.5	4.1 ± 0.4	4.8 ± 0.4	4.5 ± 0.4
Difference	−1.0 ± 0.3	−0.7 ± 0.2	0.2 ± 0.2	0.0 ± 0.2