Table 6

Standardized alphas by total ASQ-3 scale and subscales
Age interval N Total scale Communication Gross motor Fine motor Problem solving Personal social
Std. α Std. α Std. α Std. α Std. α Std. α
12 51 0.77 0.33 0.69 0.62 0.62 0.53
14 43 0.88 0.46 0.82 0.54 0.78 0.57
16 37 0.90 0.67 0.90 0.76 0.69 0.67
18 34 0.75 0.58 0.47 0.62 0.46 0.26
20 42 0.90 0.81 0.73 0.66 0.71 0.76
22 34 0.72 0.70 0.16 0.49 0.17 0.43
24 39 0.82 0.76 0.58 0.29 0.49 -*
27 47 0.84 0.73 0.64 0.59 0.45 0.36
30 37 0.84 0.57 0.35 0.63 0.51 0.70
33 42 0.87 0.81 0.48 0.71 0.63 0.50
36 16 0.91 0.92 0.28 0.30 0.70 -*

α >0.80 - highly, α = 0.60-0.80 – satisfactory, and α = 0.40-0.60 – moderate internally consistent.

* negative average covariance.

Kvestad et al.

Kvestad et al. Nutrition Journal 2013 12:50   doi:10.1186/1475-2891-12-50

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