Like the RMSE, small EAF values indicate a better match between measured and calculated values. The results of the analyses of the sociometric matrices among the members of the Brotherhood are presented in Table 6. Although all significance tests associated with the mantelapprox.m and triadapprox.m programs are significant at the level α = .0005, the size of the index values varies considerably. The concordance between the sociometric matrices measured during the 10th and last week is high, with gradient indices of (11 (A 2, A 3) = .8481) and (12 (A 2, A 3) = .7010). However, the concordance between other pairs of matrices is significantly lower. For example, the concordance between the matrices measured during the first and tenth weeks is measured with (1 (A 1, A 2) = .3375) and (12 (A 1, A 2) = .2428) for the mantle or interior gradient index. The concordance indices between the measures of the first and the last week are even lower. The reason for these results is that dramatic rankings occur at the beginning of the semester, but during the 10th week, the members of the Brotherhood are firmer in their rankings, which remain consistent during the rest of the semester. The RMSE has the same units as the measured and calculated data. Smaller values indicate a better match between the measured and calculated values. Smaller ME values indicate a better match between measured and calculated values. Positive values indicate positively distorted calculated values (overpresation), while negative values indicate distorted negative calculated values (sub-projections). numerically, with the exponent to be used for the calculation of the modified conformity index.

The default value is j=1. When the RMS value is normalized by the mean measurement, it is sometimes called the dispersion index (SI) (Zambresky 1989). When the RMS value is normalized by a certain measured value used to control a model, it is sometimes referred to as the Operating Performance Index (IPO) (Ris et al. 1999). For example, OPI can be used to estimate the performance of a nearshore wave height transformation model based on the wave height measured at sea. The mantle concordat index of symmetry A 1 was very strong (11 (A 1, ) ({mathrm{A}} )) = .6470). . . .