3.1. COP Distance 
fits
The value for the COP distance (mm), was shown to be significantly higher than the average, thus yielding a strong positive skewedness (In comparisons made in the EG, the measurement model fits the data significantly better than the null model, which is confirmed by the LOOIC difference of -44. Furthermore, the effect of time measurement accounted for 7% of the variance of the EO variable and for merely 1% of the variance of the EC variable (In comparisons of results between groups the model with the interaction effect did not fit the data better than the main effects model, which is confirmed by the KFOLDIC difference of 2, and the model did not differ from the null model (the KFOLDIC difference = −1) (