Table 1

WHO Behaviourally Anchored Rating Scale analysis of variance and G-study results for the T (team) by I (item) by P (phase) by S (site) and by R (rater) measurement design with T facet as object of measurement nested in S facet and including interactions between these components (eg, T×I=interaction between team and item) (n=54)

SourceSSdfMSVariance components
RandomMixedG-corrected*Error %SE†
T191.16513.750.070.100.100.03
I15.3643.840.000.00(0.00)0.00.01
P2.5621.280.000.00(0.00)0.00.01
S2.2721.140.000.000.01
R0.1410.140.000.00(0.00)0.00.00
T×I444.262042.180.050.27(0.00)0.00.04
T×P125.601021.230.000.06(0.00)0.00.02
T×R31.34510.610.000.040.02100.00.01
I×P30.4883.810.000.00(0.00)0.00.02
I×S20.3182.540.010.00(0.00)0.00.01
I×R3.9240.980.000.00(0.00)0.00.01
P×S16.1044.030.020.01(0.00)0.00.01
P×R0.8920.450.000.00(0.00)0.00.01
S×R0.4920.250.000.00(0.00)0.00.00
T×I×P774.624081.900.650.65(0.00)0.00.07
T×I×R115.642040.570.000.19(0.00)0.00.02
T×P×R60.341020.590.000.12(0.00)0.00.02
I×P×S35.96162.250.000.00(0.00)0.00.03
I×P×R28.4583.560.030.03(0.00)0.00.03
I×S×R4.6480.580.000.00(0.00)0.00.01
P×S×R3.7040.930.000.00(0.00)0.00.01
T×I×P×R244.774080.600.600.60(0.00)0.00.04
I×P×S×R33.18162.070.080.08(0.00)0.00.04
Total2186.191619Absolute error:0.02100%
Coefficient G (absolute)0.83
  • *G-corrected components are calculated by separating the object of measurement (T) from sources of error and accounting for facets levels and structure using Whimbey’s correction.

  • †SE (SE of the mean) is related to the mixed effects presented in the column 6. df, degrees of freedom; MS, mean squares; SS, sum of squares; grand mean (mean of all team scores across all items and phases)=4.90; SE of the grand mean=0.05.