Table 3.

Reliability and validity of the MGDB scales

MGDB scale	Cronbach’s alpha	Test-retest Pearson correlation among controls [95% CI]	Test-retest agreement: ICCs among controls [95% CI]	Spearman correlation with child TV viewing [95% CI]
Attitudes (n = 15)	0.62	0.44 [0.22–0.62]	0.45 [0.22–0.62]	− 0.11 [− 0.27–0.06]
Perceived behavioral control (n = 17)	0.61	0.28 [0.03–0.49]	0.28 [0.03–0.49]	− 0.10 [− 0.26–0.06]
Subjective norms (n = 9)	0.72	0.46 [0.24–0.64]	0.44 [0.22–0.62]	0.00 [− 0.16–0.17]
PNAE (n = 29)	0.77	0.44 [0.21–0.62]	0.42 [0.19–0.60]	− 0.02 [− 0.19–0.14]
Habits (n = 9)	0.79	0.59 [0.40–0.73]	0.59 [0.40–0.73]	− 0.14 [− 0.30–0.02]
Self-efficacy (n = 14)	0.83	0.35 [0.11–0.56]	0.35 [0.11–0.56]	− 0.08 [− 0.24–0.08]
Desires (n = 7)	0.52
Desires Factor 1 (n = 5)	0.67	0.66 [0.48–0.78]	0.66 [0.49–0.78]	− 0.07 [− 0.23–0.10]
Intentions (n = 10)	0.70	0.45 [0.22–0.63]	0.45 [0.22–0.62]	− 0.06 [− 0.22–0.10]