Table 4.

Weighted Wald Tests of Technology and Media Use by Hours Spent on Homework and Average Grade

	< 5 Homework Hours		5+ Homework Hours		Low Grades		High Grades
	Mean	SE	Mean	SE	Mean	SE	Mean	SE
Television on a weekday	4.03	0.02	3.58	0.03	4.18	0.03	3.76	0.02
Television on a weekend	4.15	0.02	4.13	0.02	4.21	0.03	4.12	0.02
Computer for school	2.80	0.03	3.94	0.05	2.85	0.04	3.36	0.04
Play electronic video games	4.57	0.02	4.43	0.04	4.81	0.02	4.45	0.02
Texting	4.54	0.03	4.54	0.03	4.91	0.04	4.45	0.03
Talking on phone	3.02	0.02	2.92	0.03	3.33	0.04	2.89	0.02
Video chatting	2.45	0.02	2.39	0.03	2.66	0.04	2.37	0.02
Social networking	4.27	0.03	4.24	0.03	4.65	0.04	4.16	0.03

Note. Coefficients in bold indicate significant mean differences at p <.01 level. The response scale for watching television on an average weekday was 1=“None,” 2= “Half hour or less,” 3= “About one hour,” 4= “About two hours,” 5= “About 3 hours,” 6= “About four hours,” 7= “Five hours or more.” The response scale for watching television on an average weekend was 1= “None,” 2= “Half hour or less,” 3= “1–2 hours,” 4= “3–4 hours,” 5= “5–6 hours,” 6= “7–8 hours,” 7= “9+ hours.” The response scale for using a computer for school and playing video games was 1= “None,” 2= “Less than 1 hour,” 3= “1–2 hours,” 4= “3–5 hours,” 5= “6–9 hours,” 6= “10–19 hours,” 7= “20–29 hours,” 8= “30–39 hours,” 9= “40 or more hours” per week. The response scale for all interactive media were 1= “None,” 2= “Less than 1 hour,” 3= “1–2 hours,” 4= “3–5 hours,” 5= “6–9 hours,” 6= “10–19 hours,” 7= “20–29 hours,” 8= “30–39 hours,” 9= “40 or more” per week.