Table 1. Changes of POMS 2-A scores before and after the experiment (n = 20).

	Before		After		t	P-valuea
	Mean	SE	Mean	SE
Anger-Hostility	2.45	0.84	1.60	0.70	3.85	0.001
Confusion-Bewilderment	4.75	0.66	3.40	0.74	2.77	0.012
Depression-Dejection	2.95	0.54	2.25	0.54	1.90	0.074
Fatigue-Inertia	4.10	0.63	3.10	0.58	2.08	0.052
Tension-Anxiety	5.50	0.72	3.75	0.55	2.57	0.019
Vigor-Activity	9.05	0.77	9.70	0.95	-0.92	0.368
Total Mood Disturbance	10.70	2.89	4.40	2.70	2.95	0.008
Friendliness	11.05	0.75	12.15	0.71	-1.78	0.092

^aP values were calculated using paired t tests.