The time-varying role of the family in student time use and achievement

Table 6 Conversion of time use categories to continuous values

	Relative	Assigned
Response ^a	frequency	value
Time on homework		h/week
Has homework, but does not do it	0.012	0
Less than 1 h each week	0.318	0.5
Between 1 and 3 h	0.405	2
More than 3 but less than 5 h	0.145	4
Between 5 and 10 h	0.088	7.5
More than 10 h	0.017	12
No homework is ever assigned	0.015	0
Amount of time spent free reading		h/day
None	0.122	0
About 30 min	0.484	0.5
About 1 h	0.206	1
Between 1 and 2 h	0.118	1.5
More than 2 h	0.070	2.5
Student uses computer at home		days/month
I use a computer at home for school work almost every day	0.065	24
Once or twice a week	0.172	6
Once or twice a month	0.178	1.5
Hardly ever	0.324	0.5
Never, even though there is a computer at home	0.155	0
There is no computer at home	0.106	0
TV watched at home each school day		h/day
None	0.048	0
1 h or less each school day	0.270	0.5
2 h	0.256	2
3 h	0.194	3
4 to 5 h	0.139	4.5
6 h or more	0.094	7