Table 3.

Japanese Compulsive Internet Use Scale (CIUS) exploratory factor analysis on first random split half sample (n = 311)

		Factor
Item	Item wording	1	2	3
Factor 1: Excessive Absorption
CIUS-14	How often do you feel restless, frustrated, or irritated when you cannot use the Internet?	.819	−.028	−.004
CIUS-6	How often do you think about the Internet, even when not online?	.812	.022	.019
CIUS-10	How often do you prefer to use the Internet instead of spending time with others (e.g., partner, children, parents)?	.808	−.174	.051
CIUS-5	How often do others (e.g. partner, children, parents) say you should use the Internet less?	.617	.195	−.223
CIUS-11	How often do you rush through your (home) work in order to go on the Internet?	.516	.038	.164
CIUS-7	How often do you look forward to your next Internet session?	.478	.061	.213
Factor 2: Difficulties in setting priorities
CIUS-13	How often do you think you should use the Internet less often?	.386	.209	.191
CIUS-12	How often do you neglect your daily obligations (work, school, or family life) because you prefer to go on the Internet?	.373	.230	.012
CIUS-2	How often do you continue to use the Internet despite your intention to stop?	−.135	.967	.040
CIUS-1	How often do you find it difficult to stop using the Internet when you are online?	.037	.875	−.067
CIUS-3	How often are you short of sleep because of Internet?	−.012	.681	.092
CIUS-4	How often have you unsuccessfully tried to spend less time on the Internet?	.236	.643	.000
Factor 3: Mood regulation
CIUS-8	How often do you go on the Internet when you are feeling down?	−.048	.012	.973
CIUS-9	How often do you use the Internet to escape from your sorrows or get relief from negative feelings?	.054	.015	.876
	% Variance explained	46.4	7.8	6.5
	Cronbach’s α coefficient	.856	.877	.931
	Chi-square	122.323
	df	52
	p-value	.000
	χ2/df	2.4