Table 4.

Comparison of total hours of video gaming per week by within and between three expertise groups.

Items in first part of VGPS		SS	df	MS	F	p
1. Total hours spent with video gaming in the past week (hours per week)	Between groups	2134.86	2	1067.43	115.82	0.001
	Within groups	1161.28	126	9.22
	Total	3296.14	128
2. Total hours in a typical week spent with video gaming when classes are in session (hour per week)	Between groups	1753.67	2	876.84	213.82	0.001
	Within groups	516.70	126	4.10
	Total	2270.37	128
3. Total hours in a typical week spent with video gaming when there is no class (hours per week)	Between groups	4327.23	2	2163.62	155.66	0.001
	Within groups	1751.31	126	13.90
	Total	6078.54	128
4a. Total hours in a typical week spent playing the game that they play most often (hours per week)	Between groups	818.08	2	409.04	138.45	0.001
	Within groups	372.27	126	2.96
	Total	1190.36	128

p < 0.001 represents significant differences within and between the three expertise groups.