Table C-2.

Ancillary bifactor measures on dimensionality and model-based reliability of ACSID-11.

	Gaming		Online gambling		Online buying/shopping	Social-networks use
Parameter	freq.	int.	freq.	int.	(frequency)	(frequency)
ω	0.967	0.976	0.985	0.987	0.979	0.972
ωH	0.935	0.930	0.967	0.968	0.951	0.936
ωHSIC	0.198	0.208	0.115	0.128	0.175	0.227
ωHSIP	0.118	0.221	0.002	0.003	0.106	0.082
ωHSCE	0.059	0.091	0.103	0.104	0.064	0.112
ECVGeneral	0.870	0.779	0.932	0.907	0.880	0.843
IECVIC1	0.923	0.922	0.915	0.976	0.909	0.835
IECVIC2	0.713	0.654	0.823	0.625	0.636	0.689
IECVIC3	0.693	0.717	0.888	0.955	0.863	0.728
IECVIP1	0.995	0.996	0.999	0.972	0.981	0.991
IECVIP2	0.711	0.971	0.964	0.995	0.669	0.893
IECVIP3	0.850	0.380	0.998	0.937	0.953	0.802
IECVCE1	0.937	0.875	0.935	0.930	0.942	0.958
IECVCE2	0.932	0.891	0.886	0.889	0.891	0.582
IECVCE3	0.936	0.932	0.853	0.855	0.959	0.996
IECVFI1	1.00	1.00	1.00	1.00	1.00	1.00
IECVMD1	1.00	1.00	1.00	1.00	1.00	1.00

Notes. Ancillary bifactor measures based on standardized model results (Rodriguez, Reise, & Haviland, 2016): ω = Omega, i.e., proportion of total score variance that can be attributed to all factors; ωH = Omega hierarchical, i.e., proportion of total score variance that can be attributed to the general factor, ωH > 0.80 indicates essential unidimensionality of the total score; ωHS = Omega hierarchical subscale, i.e., reliability of a subscale score after controlling for the variance explained by the general factor; ECV = Explained common variance, i.e., degree of essential unidimensionality with higher values indicating a strong general factor; IECV = Item explained common variance, i.e., proportion of item variance attributable to the general factor; IC = Impaired control; IP = Increased priority; CE = Continuation/escalation; FI = Functional impairment; MD = Marked distress.