Table 7.

Study 2: Demographic Characteristics of Participants (N = 632)

Demographic variable	Mean (SD) or % (n)
Child age (years)	8.62 (4.12)
Child sex (female)	44.8% (336)
Child race and ethnicity
White	84.0% (630)
Black	8.0% (60)
Asian	3.9% (29)
American Indian or Alaska Native	2.0% (15)
Native Hawaiian or other Pacific Islander	0.3% (2)
Hispanic or Latino/a (any race)	12.0% (90)
Caregiver relationship to child
Parent	92.5% (694)
Grandparent	5.5% (41)
Aunt/Uncle	5 (0.7%)
Sibling	4 (0.5%)
Other caregiver	6 (0.8%)
Caregiver age (years)	40.36 (10.01)
Caregiver sex (female)	449 (59.9%)
Caregiver race and ethnicity
White	82.3% (617)
Black	6.8% (51)
Asian	3.6% (27)
American Indian or Alaska Native	1.3% (10)
Native Hawaiian or other Pacific Islander	0.3% (2)
Hispanic or Latino/a (any race)	13.1% (98)
Caregiver education level
Did not graduate high school	1.0% (7)
High school diploma or GED only	12.0% (90)
Some college (< 4 years) or technical school	29.1% (218)
College graduate (>= 4 years)	40.4% (303)
Post-graduate work (e.g., MD, MA, PhD, JD)	17.5% (131)
Screen Media Owned by Child or in Child’s Bedroom
Television	63.7% (478)
Tablet	56.0% (420)
Video game system	45.3% (340)
Smart phone or other mobile phone	42.9% (322)
Computer/laptop	42.0% (315)
PMUM-Short Form (Cronbach alpha = .96)	2.20 (1.12)