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] |