Table 4.

Main and interaction effects for study, survey mode, gender, and age group on K10 scores.

Variable	F	df	p	ηp2
Study	18.18	1, 10191	<.001	.002
Survey Mode	43.35	1, 10191	<.001	.004
Gender	113.49	1, 10191	<.001	.011
Age Group	89.05	3, 10191	<.001	.026
Study x Mode	17.58	1, 10191	<.001	.002
Study x Gender	7.61	1, 10191	.006	.001
Study x Age Group	3.00	3, 10191	.029	.001
Mode x Age Group	45.27	3, 10191	<.001	.013
Gender x Age Group	4.97	3, 10191	.002	.001
Study x Mode x Gender	0.10	1, 10191	.755	.000
Study x Mode x Age Group	0.18	3, 10191	.912	.000
Study x Gender x Age Group	0.16	3, 10191	.925	.000
Mode x Gender x Age Group	1.05	3, 10191	.368	.000
Study x Mode x Gender x Age Group	0.07	3, 10191	.975	.000

Note. Significant effects where p < .001 and η_p² >0.001 are in bold.