Table 2. Mean differences by self-efficacy in soccer referees’ levels of impulsivity.

	Higher self-efficacy group	Lower self-efficacy group
	M(SD)	M(SD)	F (5,12)	p-value	${\eta }_P^2$
Negative urgency	2.06(0.91)	2.98(0.59)	14.47	0.002	0.48
Positive urgency	2.15(0.78)	2.67(0.85)	4.27	0.055	0.21
Lack of premeditation	1.57(0.48)	2.72(0.57)	20.96	<0.001	0.57
Lack of perseverance	1.69(0.46)	2.79(0.42)	21.81	<0.001	0.58
Sensation seeking	3.13(0.62)	2.06(0.83)	7.46	0.015	0.32
Impulsivity	2.12(0.40)	2.64(0.37)	14.56	0.002	0.48